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Which of the following numbers will replace the question mark (?) in the given series? 3, 11, 20, 28, 37, ?
Question

Which of the following numbers will replace the question mark (?) in the given series?
3, 11, 20, 28, 37, ?

A.

45

B.

55

C.

54

D.

44

Correct option is A

Given: 3, 11, 20, 28, 37, ?
Logic: The pattern alternates between adding and 9 alternatively.
11 - 3 = 8 
20 - 11 = 9
28 - 20 = 8
37 - 28 = 9
the next term:
? - 37  = 8 
? = 37 + 8 
? = 45 
Thus, the correct answer is (a) 45.

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