Puzzles - Number puzzles

Answer

:

4

Explanation

:

Reading each pair of numbers as 2 digit values, the sum of the 4 numbers is given in the top space in the diagram.

Answer

:

12

Explanation

:

In each circle, the number in the lower segment equals twice the difference between the numbers in the left and right hand segments.

Answer

:

5

Explanation

:

Working through the diagram in rows, add the left and central numbers together and subtract 2 to give the right hand value.