If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

It belongs to you, but other people use it more than you do. What is it?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?