During a school lunch break, ten kids are discussing about their holiday jobs. In particular, they would like to know their average monthly salary (for the ten of them), but no one wants to admit openly exactly how much they make. Can you devise a way for them to calculate their average (mean) salary without anyone having to tell anyone else what their individual salaries are?

Riddle Answer# Hard Riddles

## The Liar

A boy and a girl are sitting on a bench.

“I am a boy,” says the child with black hair.

“I am a girl,” says the child with brown hair.

At least one of them is lying. Who is the boy and who is the girl?

Riddle Answer## Pool Balls – Sum of 30

You have 8 balls numbered 1, 3, 5, 7, 9, 11, 13 and 15. Select 3 balls and put them into the circles such that the sum of the numbers on them add up to 30.

Riddle Answer## Missing Digit Trick

A professor asked John to write down any multi-digit number. But, he put a condition, the number should not end with a zero.

John put down the number 96452.

Then the professor asked John to add up the five digits and subtract the total from the original number. John did and here is what he got:

96452 – 26 = 96426

The professor then asked John to cross out any one of the five digits and tell him the remaining numbers. John crossed out the 2 and told the professor the rest of the digits. John neither told the professor the original number nor what he had done with it. Yet, the professor told John the exact number he had crossed out.

How is it possible?

Riddle Answer## 28 Handshakes

There was a small get-together. There were a total of 28 handshakes exchanged between the guests. How many guests were present?

Riddle Answer