What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Can you find out the missing number in the grid?

What does this mathematical rebus means ?

Find the hidden tiger in the given optical illusion ?

Find the missing number in the sequence below:

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

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?