Numbers Puzzles

19. Which number logically completes the grid?
  What is the next number?
Answer
2
In rows multiply the far left number by the far right to give the 2 digit result, written in the central squares.
20. Which number is missing from the last grid?
  What is the next number?
Answer
5
Numbers in the bottom left circle equals the sum of the numbers in corresponding segments in the upper left and centre circles. Numbers in the bottom right circle equal the difference between the numbers in the centre and right top circles.
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