Number Series Puzzles Questions

11. What number should replace the question mark?
  What is the next number?
Answer
Ans = 45.
13 x 4 = 52 – 7 = 45.
12. What number should replace the question mark?
  What is the next number?
Answer
Ans = 8.
Each number in the segment at the bottom is the sum of the four numbers in the sections either side. Thus: 8+3+4+3 = 18.
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