Puzzles - Number puzzles

Answer

:

5

Explanation

:

Take pairs of numbers at opposite ends of the diagram. Their total is always 10.

Answer

:

11

Explanation

:

In each triangle, the central value equals the sum of the 2 even numbers from the outside corners of the triangle minus the odd number.

Answer

:

5

Explanation

:

Start at the top of each triangle and move clockwise around its points. Add the first two numbers together and subtract 2 to give the next value round.