Puzzles - Number puzzles

235.
Answer
:
A:18 B:72
Explanation
:
In the first oval, all numbers are divisible by 8, and in the second, they are all divisible by 7.

236.
Answer
:
5
Explanation
:
Working through the diagram in rows, find the difference between the left and right hand values, then add 2 to give the value in the central space.

237.
Answer
:
2
Explanation
:
In each square, multiply the top and bottom numbers together to give a 2 digit result, and write this result in the left and right hand spaces.