When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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

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!!!

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

What is the fastest way to double your money?

In the image given, you can find several triangles. Can you count them all?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?