Puzzles - Number puzzles

Answer

:

4

Explanation

:

In each row of the diagram, the sum of the left and right hand digits, minus the central digit is always 8.

Answer

:

8

Explanation

:

Divide the circle, horizontally and vertically, to give 4 quarters. The sum of the numbers in the segments of each quarter equals 11.

Answer

:

6

Explanation

:

Working through the diagram in rows, and reading each row as a whole number, the diagram represents a subtraction sum : 203 - 7 = 196