Massachusetts General Knowledge Practice Test

This is our Massachusetts 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

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

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

Question 2

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

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

Question 3

Any flatbed load must have at least ______ tie downs.

A	two
B	four
C	three
D	one

Question 4

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	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 a higher gear than you would use to climb the hill.

Question 5

Serious vehicle skids are usually caused by:

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

Question 6

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

Question 7

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

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

Question 8

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

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

Question 9

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 10

Which of the following is considered a hazard?

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

Question 11

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	increases when the service brakes are hot.
D	depends on the service brakes being in adjustment.

Question 12

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 13

Wheel bearing seals should be checked for ______.

A	leaks
B	rubbing
C	burning
D	rust

Question 14

Rust around a lug nut is a sign that:

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

Question 15

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 16

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

A	Push the brake pedal firmly 5 seconds; listen for leaks.
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	Pump the brake pedal 5 times; push the pedal firmly 3 seconds; the pedal should not move.

Question 17

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

Question 18

Containerized loads are:

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

Question 19

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 20

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

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

Question 21

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

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

Question 22

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	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	the brake pedal feels firm when you apply pressure.

Question 23

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

Question 24

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 25

Empty trucks ______.

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

Question 26

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

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

Question 27

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

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

Question 28

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

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

Question 29

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

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

Question 30

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 31

______ can cause a fire.

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

Question 32

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

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

Question 33

The reason placards are used is:

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

Question 34

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

Question 35

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

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

Question 36

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 37

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

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

Question 38

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

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

Question 39

With regard to safe driving, what does communicating mean?

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

Question 40

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

A	three times
B	half
C	two times
D	four times

Question 41

A pre-trip inspection should be completed:

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

Question 42

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

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

Question 43

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

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

Question 44

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 45

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

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

Question 46

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	More space than is needed for ideal driving conditions.
C	The same amount of space you would at night.
D	The same amount of space you would on a dry road.

Question 47

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

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

Question 48

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 49

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

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

Question 50

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	downshift into the turn.
C	check to make sure that the brakes are properly balanced.
D	keep the cargo as close to the ground as possible.

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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

______ can cause a fire.

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

Question 2

Empty trucks ______.

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

Question 3

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

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

Question 4

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 5

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 a higher gear than you would use to climb the hill.
D	Use the same gear you would use to climb the hill.

Question 6

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

Question 7

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 8

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 windshield washer fluid as coolant.
D	use only water in the cooling system.

Question 9

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

Question 10

When you are driving at night, you should:

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

Question 11

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 12

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

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

Question 13

Any flatbed load must have at least ______ tie downs.

A	one
B	two
C	four
D	three

Question 14

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

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

Question 15

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

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

Question 16

Containerized loads are:

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

Question 17

Which of the following is considered a hazard?

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

Question 18

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 some liquids expand more than others when they get warm.
D	Because tank baffles are not always legal with outage.

Question 19

Rust around a lug nut is a sign that:

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

Question 20

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

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

Question 21

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 22

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

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

Question 23

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

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

Question 24

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

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

Question 25

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

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

Question 26

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

A	two times
B	four times
C	half
D	three times

Question 27

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 28

The braking power of the spring brakes:

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

Question 29

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

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

Question 30

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

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

Question 31

The reason placards are used is:

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

Question 32

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

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

Question 33

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

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

Question 34

A pre-trip inspection should be completed:

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

Question 35

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	Oil on the tie rod.
D	Too many vertical stacks.

Question 36

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

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

Question 37

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 38

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	Warn other drivers by using your left turn signal lights.
C	Turn on your 4-way emergency flashers to warn other drivers.
D	Keep your low beam lights on.

Question 39

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 40

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

Question 41

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	Greater stopping distance.
D	The same amount of stopping distance.

Question 42

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 43

If you become sleepy while driving, you should:

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

Question 44

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 45

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 have time to act before it turns into an emergency.
D	you want to avoid doing something all of a sudden.

Question 46

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

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

Question 47

Wheel bearing seals should be checked for ______.

A	rubbing
B	burning
C	rust
D	leaks

Question 48

Serious vehicle skids are usually caused by:

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

Question 49

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 50

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

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

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.

←

List

→

Return

Shaded items are 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