Puzzles - Number puzzles

208.
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.

209.
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.

210.
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.