Arizona General Knowledge Practice Test

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This is our Arizona 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

Containerized loads are:

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

Question 2

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 catch fire easily.
C	the load can shift.
D	the load should not get wet.

Question 3

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

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

Question 4

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 out of brake adjustment.
C	the trailer is empty or lightly loaded.
D	the trailer is fully loaded or very heavy.

Question 5

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

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

Question 6

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 7

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

Question 8

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

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

Question 9

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	use windshield washer fluid as coolant.
D	check the coolant level of a hot engine.

Question 10

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

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

Question 11

A pre-trip inspection should be completed:

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

Question 12

The reason placards are used is:

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

Question 13

______ can cause a fire.

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

Question 14

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 15

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

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

Question 16

Rust around a lug nut is a sign that:

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

Question 17

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	it is absolutely necessary.
C	testing the trailer brakes after hooking up to a trailer.
D	there is ice and snow, to prevent skidding.

Question 18

Wheel bearing seals should be checked for ______.

A	rust
B	leaks
C	burning
D	rubbing

Question 19

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

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

Question 20

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

Question 21

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 22

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	More space than is needed for ideal driving conditions.
D	One vehicle length for every 10,000 lb. of gross vehicle weight.

Question 23

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 24

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

Question 25

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

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

Question 26

Serious vehicle skids are usually caused by:

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

Question 27

Which of the following is considered a hazard?

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

Question 28

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

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

Question 29

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

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

Question 30

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

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

Question 31

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

Question 32

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

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

Question 33

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	Slow to a safe speed before the curve.
C	Nothing, because the posted speed limit for the offramp is usually 10 miles per hour below the safe speed limit for the offramp.
D	Downshift after you are in the curve.

Question 34

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

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

Question 35

With regard to safe driving, what does communicating mean?

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

Question 36

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

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

Question 37

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

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

Question 38

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

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

Question 39

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

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

Question 40

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

A	half
B	four times
C	two times
D	three times

Question 41

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 42

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

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

Question 43

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

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

Question 44

Any flatbed load must have at least ______ tie downs.

A	two
B	four
C	one
D	three

Question 45

When you are driving at night, you should:

A	make sure you are driving slow enough so you can stop within the range of your headlights in case of an emergency.
B	keep your high beams on at all times.
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 46

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

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

Question 47

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

Question 48

The braking power of the spring brakes:

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

Question 49

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

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

Question 50

Empty trucks ______.

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

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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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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

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

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

Question 2

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

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

Question 3

Rust around a lug nut is a sign that:

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

Question 4

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

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

Question 5

Containerized loads are:

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

Question 6

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

Question 7

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

Question 8

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 9

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

A	Slow to a safe speed before 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	Downshift after you are in the curve.
D	Turn on your four-way flashers as you approach the offramp.

Question 10

Wheel bearing seals should be checked for ______.

A	rust
B	leaks
C	rubbing
D	burning

Question 11

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 end of the kingpin is even with the top of the fifth wheel.
C	the end of the kingpin is at waist level.
D	the kingpin is about 1¼ inches above the fifth wheel.

Question 12

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

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

Question 13

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

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

Question 14

If you become sleepy while driving, you should:

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

Question 15

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

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

Question 16

Serious vehicle skids are usually caused by:

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

Question 17

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

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

Question 18

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

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

Question 19

The two driving conditions in which you should downshift are:

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

Question 20

______ can cause a fire.

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

Question 21

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

Question 22

The reason placards are used is:

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

Question 23

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

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

Question 24

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

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

Question 25

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

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

Question 26

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 the cargo as close to the ground as possible.
C	keep two hands firmly planted on the steering wheel at all times.
D	downshift into the turn.

Question 27

The braking power of the spring brakes:

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

Question 28

A pre-trip inspection should be completed:

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

Question 29

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 30

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

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

Question 31

Any flatbed load must have at least ______ tie downs.

A	two
B	one
C	four
D	three

Question 32

Empty trucks ______.

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

Question 33

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

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

Question 34

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	three or more.
C	seven or more.
D	five or more.

Question 35

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	it is absolutely necessary.
C	testing the trailer brakes after hooking up to a trailer.
D	there is ice and snow, to prevent skidding.

Question 36

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

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

Question 37

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

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

Question 38

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

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

Question 39

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

A	three times
B	two times
C	half
D	four times

Question 40

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

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

Question 41

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

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

Question 42

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

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

Question 43

Which of the following is considered a hazard?

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

Question 44

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

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

Question 45

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

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

Question 46

When you are driving at night, you should:

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

Question 47

You know your brakes are fading when:

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

Question 48

With regard to safe driving, what does communicating mean?

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

Question 49

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

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

Question 50

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 out of brake adjustment.
C	the trailer is empty or lightly loaded.
D	the trailer is fully loaded or very heavy.

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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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

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