When I get multiplied by any number, the sum of the figures in the product is always me. 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 does this rebus mean?

O
N
C
E
TIME

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.