Number Series Puzzles Questions

7. What numbers should replace the question marks?
  What is the next number?
Answer
Ans =
70 / 14 = 5;
91 / 13 = 7
120 / 24 = 5.
8. What number should replace the question mark?
  What is the next number?
Answer
Ans = 25.
There are two alternate sequences: +4 and -3.
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