Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What can you hold in your right hand, but never in your left hand?

Can you count the number of blocks in the picture below?

What does the below rebus puzzle mean?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

What is next number in the pattern below:

131 517 192 123 ?

What can go up a chimney down, but can’t go down a chimney up?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?