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Number Puzzles Questions and Answers

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40. What number should replace the question mark?
Ans: 11.
Sol.
(6×11) + 24 = 90
 
41. What number should replace the question mark?
1, 2, 6, 12, 36, 72, ?
Ans: 216.
Sol.
×2, ×3 repeated.
 
42.
Ans: 11
Sol.
The rule is replace – with +, so – 26 + 37 = 11.