You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

I know a nine-letter word having only one vowel.
Do you ?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

You need to remove two matchsticks to make the below equation true. Can you do it ?

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?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

81 x 9 = 801. What must you do to make the this equation true?

Can you solve the maths in the below-given picture equation?

What is the coolest letter in the alphabet?