There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

I cannot talk, but I always reply when spoken to. What am I?

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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What is the next number in this matchsticks series riddle?