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Which number will replace the question mark (?) in the following series?17, 32, 49, ?, 89, 112
Question

Which number will replace the question mark (?) in the following series?
17, 32, 49, ?, 89, 112

A.

62

B.

72

C.

68

D.

78

Correct option is C

Given: The series is: 17, 32, 49, ?, 89, 112
Concept: +15,+17, +19, ……… pattern follows as its double difference is 2.
Explanation:
17+15=32
32+17=49
49+19=68
68+21=89
89+23=112
So, missing number = 68  
Thus, correct option is (c)

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