Numbers Puzzles

7. Which number replaces the question mark?
  What is the next number?
Answer
1
The centre figure is the difference between the product of the top two numbers and the product of the bottom two
8. Which number is needed to complete the puzzle?
  What is the next number?
Answer
14
Starting top left and moving to the right, then down to the left, and finally down to the right, numbers increase by steps of 2, 3, 4 etc.
12345678910

Page 4 of 10