Missing Number Puzzles Questions

15. Which is the missing section?
  What is the next number?
Answer
Ans = 13.
The numbers in each circle total 100.
16. What number should replace the question mark?
  What is the next number?
Answer
12.25.
add 1.25, 1.5, 1.75, 2, 2.25, 2.5
123456789101112131415


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