What is black when you buy it, red when you use it, and gray when you throw it away?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

Replace the question mark with the correct number in the below-given picture?

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.

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?