A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

10+10 and 11+11 can give you the same answer.

Explain how?

What number should come in place of the question mark below?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Which number should replace the question mark?

People put me on the table and cut me but do not eat me. What am I?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?