Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

A man dies of old age on his 25 birthday. How is this possible?

I have an eye but still cannot see.

Who am I?

Can you start the fire using two pieces of wood?

Count the number of triangles in the picture below:

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

What do you call a fish without an eye?

Replace the question mark in the picture below.