Find the missing number in the series 1, 6, ?, 15, 45, 66, 91

1.	Find the missing number in the series 1, 6, ?, 15, 45, 66, 91
A.	24
B.	28
C.	32
D.	26
Answer» C. 32

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Find the missing number in the series 1, 6, ?, 15, 45, 66, 91

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