The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.

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?

Count the number of balls in picture below:

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What's a single-digit number with no value?

How could a baby fall out of a twenty-story building onto the ground and live?

I’m tall when I’m young, and I’m short when I’m old. What am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?