Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Why 1729 is a magic number? Answer Logically.

I cannot talk, but I always reply when spoken to. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

How many letters are in the alphabet?

Which of the below owl is odd one out?