Number series

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Directions : What will come in place of (?) in the following number series?

4.5, 10, 12, 25, 27, 55, ?

57

58

111

53

110

Explanation:

Series is

4.5 × 2 + 1 = 10

10 × 1 + 2 = 12

12 × 2 + 1 = 25

25 × 1 + 2 = 27

27 × 2 + 1 = 55

55 × 1 + 2 = 57

By: Parvesh Mehta

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