Puzzles - Number puzzles

Answer

:

22

Explanation

:

In each circle, the lower number equals the product of the top two numbers, subtracting 3 for the left hand circle, 4 for the middle, and 5 for the right hand circle.

Answer

:

4

Explanation

:

In each diamond, add the left and right hand numbers together, and subtract this sum from the top number to give the value at the bottom.

Answer

:

7

Explanation

:

In each row of the diagram, the central value equals the sum of the differences between the left hand pair of numbers and the right hand pair of numbers.