In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Give it food and it will live; give it water and it will die.

Prove that twice of ten is the same as twice of eleven.

With the help clues provided in the image, can you find the 5 digit key?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?