What is harder to catch the faster you run?

Who can jump higher than a Mountain?

What does this rebus mean?

O
N
C
E
TIME

What has many teeth, but cannot bite?

The centre of the third figure is empty. What digit should fit inside?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?