Nevada General Knowledge Practice Test

This is our Nevada General Knowledge Practice Quiz and Practice Test compiled of 50 questions each. Each question is worth two points for a total of 100 possible points. A passing score is 80%.

The General Knowledge Practice Quiz reveals the correct answer during each question to help you study for the actual General Knowledge test. The General Knowledge Practice Test doesn’t reveal the correct answers until the test is over.

The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window. It’s that easy.

Press the start button to begin your free General Knowledge Practice Quiz. Good luck!

General Knowledge CDL Practice Quiz

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Congratulations! You have completed the General Knowledge CDL Practice Quiz. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Your ______ are the most important way to see the sides and rear of your vehicle.

A	sunglasses
B	rear view cameras
C	rolled down windows
D	mirrors

Question 2

When backing your vehicle, why should you use a helper?

A	To prevent others from distracting you.
B	To direct traffic away from you.
C	To see the blind spots you can't see.
D	To watch for steering errors.

Question 3

The most important reason for conducting a pre-trip inspection of your vehicle is:

A	to ensure safety for yourself, your passengers, and other drivers.
B	to help ensure the vehicle will make it to your destination.
C	because it is a requirement for all drivers.
D	because law enforcement may inspect your vehicle on the road.

Question 4

When loading cargo, what is an important rule to remember?

A	Load more weight over the drive axle for better traction.
B	Load more cargo toward the front of the truck for a full load.
C	Load cargo weight evenly over all the axles.
D	Load cargo toward the rear of the truck for easier unloading.

Question 5

Why should know the outage needed for the liquids you carry?

A	Because some liquids expand more than others when they get warm.
B	Because it's good to know that information.
C	Because tank baffles are not always legal with outage.
D	Because some of the heaviest liquids don’t need any.

Question 6

Your stopping distance will increase by ______, if you double your speed.

A	four times
B	two times
C	half
D	three times

Question 7

The correct term for a long commercial vehicle's tendency to swing wide on turns is:

A	slidetracking.
B	sidetracking.
C	fishtailing.
D	offtracking.

Question 8

Before transporting a sealed load, it is important to check that the:

A	seal is authentic.
B	seal is secure.
C	placard numbers match the seal numbers.
D	load is properly secured.

Question 9

When checking the adjustment on air brakes, slack adjusters should have ______ of travel.

A	two inches
B	three inches
C	one half inch
D	one inch

Question 10

Two main things to look for up ahead while driving are ______ and ______.

A	truck stops, gas stations
B	vehicles, traffic signs
C	tunnels, overpasses
D	law enforcement officers, detours

Question 11

What happens as a person's Blood Alcohol Concentration (BAC) goes up?

A	All of these things happen.
B	The drinker's brain is increasingly affected.
C	Muscle control and coordination are affected.
D	Judgment and self-control are the first to be affected.

Question 12

If your vehicle has a retarder, you should turn it off when:

A	the road is wet, icy, or snow covered.
B	you are driving on hilly, rural roads.
C	road conditions are excellent.
D	you are driving on the freeway.

Question 13

One reason why dry bulk tanks require special care is because:

A	a dry bulk tank should only be filled halfway.
B	the load can shift.
C	the load should not get wet.
D	the load can catch fire easily.

Question 14

How many red reflective triangles should be in your vehicle's emergency equipment?

A	A minimum of one.
B	A minimum of four.
C	A minimum of three.
D	A minimum of two.

Question 15

While doing the pre-trip inspection on your vehicle's steering and exhaust system you found the following problems. Which one, if any, should be fixed before you drive the vehicle?

A	Play in the steering wheel of more than five degrees.
B	Too many vertical stacks.
C	Play in the steering wheel of more than ten degrees (two inches on a 20-inch steering wheel).
D	Oil on the tie rod.

Question 16

When driving a slow-moving vehicle on a 2-lane highway, you must pull off at the first safe turnout when the number of vehicles behind you is:

A	three or more.
B	none of these.
C	seven or more.
D	five or more.

Question 17

The reason placards are used is:

A	to make your vehicle look official.
B	to combat terrorism.
C	to warn others of hazardous materials.
D	to avoid mixing hazmat with food.

Question 18

Which of the following fires can be safely extinguished by water?

A	None of these fires can be safely extinguished by water.
B	Grease fire.
C	Electrical fire.
D	Gasoline fire.

Question 19

With regard to safe driving, what does communicating mean?

A	Using hand signals.
B	Using a helper when backing up.
C	Using turn signals, 4-way flashers, headlights, and the horn.
D	Using your CB radio or cell phone to inform others.

Question 20

When a coolant container is part of a pressurized system, you can:

A	safely remove the radiator cap and add coolant while the engine is hot.
B	use only water in the cooling system.
C	use windshield washer fluid as coolant.
D	check the coolant level of a hot engine.

Question 21

The minimum tread depth that front tires should have for safety is:

A	2/32-inch in every major groove.
B	5/32-inch in every major groove.
C	4/32-inch in every major groove.
D	3/32-inch in every major groove.

Question 22

What three things add up to the total stopping distance for your vehicle?

A	Perception distance, response distance, and reaction distance.
B	Observation distance, reaction distance, and slowing distance.
C	Perception distance, reaction distance, and braking distance.
D	Perception distance, slowing distance, and braking distance.

Question 23

You should make emergency plans when you see a hazard because:

A	you want to have a plan to communicate the risk.
B	it is a federal law.
C	you want to avoid doing something all of a sudden.
D	you want to have time to act before it turns into an emergency.

Question 24

When you are driving at night, you should:

A	keep your high beams on at all times.
B	roll down your window so that the fresh air will help keep you awake.
C	drink coffee or other caffeine products to help keep you awake.
D	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.

Question 25

Rust around a lug nut is a sign that:

A	the wheel needs cleaning.
B	the lug nut is loose.
C	the lug nut is cheap.
D	the lug nut needs to be replaced.

Question 26

Containerized loads are:

A	exempt from hazardous materials restrictions.
B	exempt from height restrictions.
C	generally used when freight is carried part way by rail or ship.
D	exempt from weight limit restrictions.

Question 27

The amount of liquid to load into a tank depends on:

A	the weight of the liquid.
B	neither of these.
C	both of these.
D	the legal weight limits.

Question 28

How much stopping distance does a light, empty truck require, compared to the same truck fully loaded and heavy?

A	Shorter stopping distance.
B	The same amount of stopping distance.
C	It depends on what mood you are in at the time.
D	Greater stopping distance.

Question 29

Before backing under, when coupling a semi-trailer to your tractor, the trailer is at the right height when:

A	it will be raised slightly when the tractor is backed under it.
B	the kingpin is about 1¼ inches above the fifth wheel.
C	the end of the kingpin is even with the top of the fifth wheel.
D	the end of the kingpin is at waist level.

Question 30

Any flatbed load must have at least ______ tie downs.

A	three
B	two
C	four
D	one

Question 31

Due to its size, if your vehicle cannot make a right turn without swinging into another lane, you should ______ to prevent others from passing you on the right.

A	turn wide before you start the turn
B	turn right and drive over the curb
C	start the turn, then back up to re-position
D	turn wide as you complete the turn

Question 32

Serious vehicle skids are usually caused by:

A	driving too fast for road conditions.
B	poorly adjusted brakes.
C	driving too slow for road conditions.
D	bad tires.

Question 33

The two main causes of tire fires are ______ and ______.

A	over-heated brakes, under-inflated tires
B	poor-quality retreads, under-inflated tires
C	dual tires that touch, hot road surfaces
D	under-inflated tires, dual tires that touch

Question 34

You are operating a new truck with a manual transmission and are about to drive down a long, steep downhill grade? What should you do?

A	Use a higher gear than you would use to climb the hill.
B	Use a lower gear than you would use to climb the hill.
C	Shift the truck into neutral and coast down the hill to save gas.
D	Use the same gear you would use to climb the hill.

Question 35

You know your brakes are fading when:

A	the brake pedal feels firm when you apply pressure.
B	there is a slight vibration when you press down on the brake pedal.
C	you release pressure on the brake pedal and speed increases.
D	you have to push harder and harder to get the same stopping power on a downgrade.

Question 36

Empty trucks ______.

A	have better traction when stopping than full trucks
B	require greater stopping distance than full trucks
C	need less space ahead than full trucks
D	have the same stopping distance as full trucks

Question 37

You are exiting a highway using an offramp that curves downhill and you are driving a heavy vehicle. What should you do?

A	Turn on your four-way flashers as you approach the offramp.
B	Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp.
C	Slow to a safe speed before the curve.
D	Downshift after you are in the curve.

Question 38

______ can cause a fire.

A	both loose fuel connections and under inflated tires
B	loose fuel connections
C	under inflated tires
D	eating spicy food in the truck cab

Question 39

A trailer is more likely to swing around when the trailer wheels lock up when:

A	the trailer is fully loaded or very heavy.
B	the trailer is empty or lightly loaded.
C	the trailer is being hauled at high speed.
D	the trailer is out of brake adjustment.

Question 40

Which of the following is considered a hazard?

A	A stopped transit bus.
B	Road construction zones.
C	Pedestrians and bicyclists.
D	All of these are considered a hazard.

Question 41

Wheel bearing seals should be checked for ______.

A	rust
B	leaks
C	rubbing
D	burning

Question 42

When driving on a slippery road during the day, how much space should you keep ahead of your truck?

A	The same amount of space you would on a dry road.
B	The same amount of space you would at night.
C	One vehicle length for every 10,000 lb. of gross vehicle weight.
D	More space than is needed for ideal driving conditions.

Question 43

Whenever you are parked at the side of the road at night, you must do which of the following?

A	Turn on your 4-way emergency flashers to warn other drivers.
B	Keep your low beam lights on.
C	Put your warning devices out within 15 minutes.
D	Warn other drivers by using your left turn signal lights.

Question 44

If you become sleepy while driving, you should:

A	roll down the windows.
B	slap yourself in the face three times.
C	stop to sleep.
D	turn up the radio.

Question 45

The two driving conditions in which you should downshift are:

A	before starting down a hill and before entering a tunnel.
B	before starting down a hill and before entering a curve.
C	before starting down a hill and before going up a hill.
D	before going up a hill and before entering a curve.

Question 46

Two things a driver can do to prevent a rollover are, to go slow around turns, and also:

A	keep two hands firmly planted on the steering wheel at all times.
B	keep the cargo as close to the ground as possible.
C	check to make sure that the brakes are properly balanced.
D	downshift into the turn.

Question 47

A pre-trip inspection should be completed:

A	whenever you stop to refuel.
B	if any problems occurred the last the time the vehicle was operated.
C	at least once a week.
D	before operating the vehicle.

Question 48

Which of the following methods should you use to test hydraulic brakes for leaks?

A	Move forward slowly and push firmly on the brake pedal.
B	Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move.
C	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.
D	Push the brake pedal firmly 5 seconds; listen for leaks.

Question 49

The braking power of the spring brakes:

A	is not affected by the condition of the service brakes.
B	depends on the service brakes being in adjustment.
C	increases when the service brakes are hot.
D	decreases when the service breaks are hot.

Question 50

The trailer hand valve (also called the trolley valve or Johnson bar) should only be used when:

A	you will be parked for a short time.
B	testing the trailer brakes after hooking up to a trailer.
C	it is absolutely necessary.
D	there is ice and snow, to prevent skidding.

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Remember, the General Knowledge Practice Test doesn’t reveal the correct answers until the test is over. The questions and answers are given in random order each time you retake the test. When you are finished testing, simply click on the “Get Results” button to see your test results. Clicking on the blue “List” button will reveal a list of all the questions you answered correctly and incorrectly. To take the test again, just refresh your browser window.

Press the start button to begin your free General Knowledge Practice Test. Good luck!

General Knowledge CDL Practice Test

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If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

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Congratulations! You have completed the General Knowledge CDL Practice Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Your ______ are the most important way to see the sides and rear of your vehicle.

A	mirrors
B	sunglasses
C	rear view cameras
D	rolled down windows

Question 2

While doing the pre-trip inspection on your vehicle's steering and exhaust system you found the following problems. Which one, if any, should be fixed before you drive the vehicle?

A	Play in the steering wheel of more than ten degrees (two inches on a 20-inch steering wheel).
B	Play in the steering wheel of more than five degrees.
C	Too many vertical stacks.
D	Oil on the tie rod.

Question 3

A trailer is more likely to swing around when the trailer wheels lock up when:

A	the trailer is being hauled at high speed.
B	the trailer is fully loaded or very heavy.
C	the trailer is empty or lightly loaded.
D	the trailer is out of brake adjustment.

Question 4

Before transporting a sealed load, it is important to check that the:

A	seal is authentic.
B	load is properly secured.
C	placard numbers match the seal numbers.
D	seal is secure.

Question 5

You should make emergency plans when you see a hazard because:

A	you want to avoid doing something all of a sudden.
B	you want to have a plan to communicate the risk.
C	you want to have time to act before it turns into an emergency.
D	it is a federal law.

Question 6

When you are driving at night, you should:

A	keep your high beams on at all times.
B	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.
C	roll down your window so that the fresh air will help keep you awake.
D	drink coffee or other caffeine products to help keep you awake.

Question 7

One reason why dry bulk tanks require special care is because:

A	the load can catch fire easily.
B	the load can shift.
C	the load should not get wet.
D	a dry bulk tank should only be filled halfway.

Question 8

Two things a driver can do to prevent a rollover are, to go slow around turns, and also:

A	check to make sure that the brakes are properly balanced.
B	keep two hands firmly planted on the steering wheel at all times.
C	downshift into the turn.
D	keep the cargo as close to the ground as possible.

Question 9

What three things add up to the total stopping distance for your vehicle?

A	Perception distance, reaction distance, and braking distance.
B	Observation distance, reaction distance, and slowing distance.
C	Perception distance, slowing distance, and braking distance.
D	Perception distance, response distance, and reaction distance.

Question 10

Your stopping distance will increase by ______, if you double your speed.

A	half
B	four times
C	three times
D	two times

Question 11

How many red reflective triangles should be in your vehicle's emergency equipment?

A	A minimum of one.
B	A minimum of two.
C	A minimum of three.
D	A minimum of four.

Question 12

If you become sleepy while driving, you should:

A	turn up the radio.
B	roll down the windows.
C	slap yourself in the face three times.
D	stop to sleep.

Question 13

Which of the following is considered a hazard?

A	A stopped transit bus.
B	Pedestrians and bicyclists.
C	Road construction zones.
D	All of these are considered a hazard.

Question 14

When driving on a slippery road during the day, how much space should you keep ahead of your truck?

A	More space than is needed for ideal driving conditions.
B	The same amount of space you would at night.
C	The same amount of space you would on a dry road.
D	One vehicle length for every 10,000 lb. of gross vehicle weight.

Question 15

When checking the adjustment on air brakes, slack adjusters should have ______ of travel.

A	two inches
B	one inch
C	one half inch
D	three inches

Question 16

What happens as a person's Blood Alcohol Concentration (BAC) goes up?

A	All of these things happen.
B	The drinker's brain is increasingly affected.
C	Judgment and self-control are the first to be affected.
D	Muscle control and coordination are affected.

Question 17

Due to its size, if your vehicle cannot make a right turn without swinging into another lane, you should ______ to prevent others from passing you on the right.

A	turn wide before you start the turn
B	turn right and drive over the curb
C	turn wide as you complete the turn
D	start the turn, then back up to re-position

Question 18

The braking power of the spring brakes:

A	depends on the service brakes being in adjustment.
B	increases when the service brakes are hot.
C	is not affected by the condition of the service brakes.
D	decreases when the service breaks are hot.

Question 19

Wheel bearing seals should be checked for ______.

A	leaks
B	burning
C	rust
D	rubbing

Question 20

The two main causes of tire fires are ______ and ______.

A	poor-quality retreads, under-inflated tires
B	over-heated brakes, under-inflated tires
C	dual tires that touch, hot road surfaces
D	under-inflated tires, dual tires that touch

Question 21

Why should know the outage needed for the liquids you carry?

A	Because some of the heaviest liquids don’t need any.
B	Because it's good to know that information.
C	Because tank baffles are not always legal with outage.
D	Because some liquids expand more than others when they get warm.

Question 22

If your vehicle has a retarder, you should turn it off when:

A	the road is wet, icy, or snow covered.
B	road conditions are excellent.
C	you are driving on the freeway.
D	you are driving on hilly, rural roads.

Question 23

Any flatbed load must have at least ______ tie downs.

A	two
B	one
C	four
D	three

Question 24

How much stopping distance does a light, empty truck require, compared to the same truck fully loaded and heavy?

A	Shorter stopping distance.
B	It depends on what mood you are in at the time.
C	The same amount of stopping distance.
D	Greater stopping distance.

Question 25

You are exiting a highway using an offramp that curves downhill and you are driving a heavy vehicle. What should you do?

A	Downshift after you are in the curve.
B	Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp.
C	Turn on your four-way flashers as you approach the offramp.
D	Slow to a safe speed before the curve.

Question 26

The most important reason for conducting a pre-trip inspection of your vehicle is:

A	to help ensure the vehicle will make it to your destination.
B	because law enforcement may inspect your vehicle on the road.
C	to ensure safety for yourself, your passengers, and other drivers.
D	because it is a requirement for all drivers.

Question 27

Which of the following methods should you use to test hydraulic brakes for leaks?

A	Move forward slowly and push firmly on the brake pedal.
B	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.
C	Push the brake pedal firmly 5 seconds; listen for leaks.
D	Pump the brake pedal 3 times; push the pedal firmly 5 seconds; the pedal should not move.

Question 28

The two driving conditions in which you should downshift are:

A	before starting down a hill and before entering a curve.
B	before going up a hill and before entering a curve.
C	before starting down a hill and before going up a hill.
D	before starting down a hill and before entering a tunnel.

Question 29

You know your brakes are fading when:

A	you release pressure on the brake pedal and speed increases.
B	there is a slight vibration when you press down on the brake pedal.
C	you have to push harder and harder to get the same stopping power on a downgrade.
D	the brake pedal feels firm when you apply pressure.

Question 30

You are operating a new truck with a manual transmission and are about to drive down a long, steep downhill grade? What should you do?

A	Shift the truck into neutral and coast down the hill to save gas.
B	Use a lower gear than you would use to climb the hill.
C	Use the same gear you would use to climb the hill.
D	Use a higher gear than you would use to climb the hill.

Question 31

The correct term for a long commercial vehicle's tendency to swing wide on turns is:

A	slidetracking.
B	sidetracking.
C	fishtailing.
D	offtracking.

Question 32

Rust around a lug nut is a sign that:

A	the lug nut needs to be replaced.
B	the wheel needs cleaning.
C	the lug nut is loose.
D	the lug nut is cheap.

Question 33

______ can cause a fire.

A	underinflated tires
B	overinflated tires
C	both loose fuel connections and under inflated tires
D	loose fuel connections

Question 34

Two main things to look for up ahead while driving are ______ and ______.

A	law enforcement officers, detours
B	tunnels, overpasses
C	truck stops, gas stations
D	vehicles, traffic signs

Question 35

When loading cargo, what is an important rule to remember?

A	Load more cargo toward the front of the truck for a full load.
B	Load cargo toward the rear of the truck for easier unloading.
C	Load cargo weight evenly over all the axles.
D	Load more weight over the drive axle for better traction.

Question 36

When a coolant container is part of a pressurized system, you can:

A	use only water in the cooling system.
B	safely remove the radiator cap and add coolant while the engine is hot.
C	check the coolant level of a hot engine.
D	use windshield washer fluid as coolant.

Question 37

Before backing under, when coupling a semi-trailer to your tractor, the trailer is at the right height when:

A	the end of the kingpin is at waist level.
B	it will be raised slightly when the tractor is backed under it.
C	the end of the kingpin is even with the top of the fifth wheel.
D	the kingpin is about 1¼ inches above the fifth wheel.

Question 38

The minimum tread depth that front tires should have for safety is:

A	5/32-inch in every major groove.
B	2/32-inch in every major groove.
C	3/32-inch in every major groove.
D	4/32-inch in every major groove.

Question 39

Serious vehicle skids are usually caused by:

A	bad tires.
B	poorly adjusted brakes.
C	driving too slow for road conditions.
D	driving too fast for road conditions.

Question 40

Which of the following fires can be safely extinguished by water?

A	Grease fire.
B	None of these fires can be safely extinguished by water.
C	Gasoline fire.
D	Electrical fire.

Question 41

When driving a slow-moving vehicle on a 2-lane highway, you must pull off at the first safe turnout when the number of vehicles behind you is:

A	none of these.
B	seven or more.
C	five or more.
D	three or more.

Question 42

Containerized loads are:

A	generally used when freight is carried part way by rail or ship.
B	exempt from hazardous materials restrictions.
C	exempt from height restrictions.
D	exempt from weight limit restrictions.

Question 43

When backing your vehicle, why should you use a helper?

A	To direct traffic away from you.
B	To see the blind spots you can't see.
C	To prevent others from distracting you.
D	To watch for steering errors.

Question 44

A pre-trip inspection should be completed:

A	whenever you stop to refuel.
B	if any problems occurred the last the time the vehicle was operated.
C	at least once a week.
D	before operating the vehicle.

Question 45

With regard to safe driving, what does communicating mean?

A	Using your CB radio or cell phone to inform others.
B	Using hand signals.
C	Using a helper when backing up.
D	Using turn signals, 4-way flashers, headlights, and the horn.

Question 46

The reason placards are used is:

A	to avoid mixing hazmat with food.
B	to make your vehicle look official.
C	to combat terrorism.
D	to warn others of hazardous materials.

Question 47

The trailer hand valve (also called the trolley valve or Johnson bar) should only be used when:

A	you will be parked for a short time.
B	testing the trailer brakes after hooking up to a trailer.
C	there is ice and snow, to prevent skidding.
D	it is absolutely necessary.

Question 48

The amount of liquid to load into a tank depends on:

A	neither of these.
B	the legal weight limits.
C	both of these.
D	the weight of the liquid.

Question 49

Whenever you are parked at the side of the road at night, you must do which of the following?

A	Keep your low beam lights on.
B	Put your warning devices out within 15 minutes.
C	Turn on your 4-way emergency flashers to warn other drivers.
D	Warn other drivers by using your left turn signal lights.

Question 50

Empty trucks ______.

A	have the same stopping distance as full trucks
B	need less space ahead than full trucks
C	require greater stopping distance than full trucks
D	have better traction when stopping than full trucks

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 50 questions to complete.

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36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
End