Make the 10 coin pyramid on the left look like the inverted pyramid on the right by moving only 3 coins.

Riddle Answer# Picture Riddles

## 40 Matchsticks

Below are 40 matchsticks arranged in a square grid.

What is the fewest number of matchsticks that need to be removed so that there are no squares (of any size) remaining?

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## 16 Isolation Rooms

A hospital has 16 isolation rooms. Each room has a patient with a different illness.

Patient in room 13 recovers and wants to say goodbye to each patient. The problem is that if he visits a patient twice, he becomes ill again.

How does he visit each patient only once and exit from room 4?

Riddle Answer## Adding up to 15

How can you place the numbers 1 through 9 in a 3×3 grid such that every row, column, and the two diagonals all add up to 15?

Riddle Answer