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Which of the following numbers will replace the question mark (?) in the given series? 18, 23, 32, 37, 46, ?
Question

Which of the following numbers will replace the question mark (?) in the given series?

18, 23, 32, 37, 46, ?

A.

49

B.

51

C.

61

D.

57

Correct option is B

Given series: 18, 23, 32, 37, 46, ?
Find the differences between consecutive terms:
23 - 18 = 5
32 - 23 = 9
37 - 32 = 5
46 - 37 = 9
The differences alternate between 5 and 9. Following this pattern, the next difference should be 5.
So, add 5 to the last term (46):
46 + 5 = 51
Therefore, the number that replaces the question mark is: (b) 51

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