If the two men are pushing against the pushball in the direction shown, in which direction is it most likely to go?

Which wheel presses harder against the rail?

If the small wheel goes in the direction shown, in which direction will the large wheel go?

When the car is in a tunnel how will the horn sound?

If the large wheel moves in the direction shown, in which direction will the small one move?

Which gear will make the most turns in a minute?

Which will hold more water, the two tanks at A or the one at tank B?

Which arch is stronger?

Which rope is under more strain?

If the upper wheel moves in the direction shown, in which direction does the other one move?

Which man has to pull harder to move the barrel?

Which wall will keep a house warmer in winter?

Which side of the road should be built higher?

Which wheel turns round more times when going along the road?

Which of these streams is flowing faster?

Which acrobat will find it easier to keep her balance?

Which metal container will hold more sugar?

Which one piece of chain is needed to support the bird-house?

Which way will the boat go?

Which is more likely to tip over?

Which rock will get hotter in the sun?

Which girl can swing back and forth more times in a minute?

Which picture shows the way a paint brush would look in a bowl of water?

In which case will the water splash more?

On which animal's back will the snow melt more rapidly?

When this boat goes through waves, which man will have the smoother ride?

This star has two planets. Which planet will take longer to go around the star?

Which wire carries more current?

The man will hear the sound of the cannon:

Which stepladder is safer to climb on?

If the rock and tank of water together in picture 1 weigh 50 kilograms, what will they weigh in picture 2?

Which of these would lift off from the surface of the moon?

Which wheelbarrow would be easier to roll over uneven ground?

With this rig, the hook when moved to the right will:

Which way will the plank support the heavier weight?

From which fire hydrant will the water spurt farther?

On the moon a bullet from a rifle will:

In which direction does the water in the right-hand pipe go?

Which is made of the heavier material?

To pull this boat along the canal, at which point is it better to attach the rope?

Which way will the bundle be easier to carry?

Which path is steeper?

Which picture shows the way a bomb from a moving aeroplane if there is no wind?

Which rail should be built higher?

Which jar will let the most water run out?

With which windlass can a man raise the heavier weight?

If light travels more slowly through glass than through air, which shape lens will make objects look larger?

To keep the plane going straight if the engine ''X'' stops, in which direction should the rudder be moved?

Which is the better way to brace a screen door to keep it from sagging?

Which way should two 6-volt batteries be connected to give 12 volts?

When the man pulls the rope which weight will be lifted first?

Which pair of wheels presses more heavily on the rails?

If there are no clouds, on which night will you be able to see more stars?

If one ball is thrown straight out and the other one dropped at the same instant, which will hit the water first?

Which bridge is stronger?

When the little wheel turns around, the big wheel will:

Which switch will light only lamp ''X''?

Which picture shows the way mud flies off a bicycle wheel?

On which part of the rope is the strain greater?

Which measure is marked properly?

Which orange squeezer will take less strength to use?

Which tank will empty faster?

With which windlass can a man raise the heavier weight?

Which set of gears will turn freely?

With which arrangement can a man lift the heavier weight?

Past which point will more water pass in one minute?

Which part of the refrigerator is colder?