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Odd and Even Numbers

Find the miss...

Question

Find the missing term in the following series.
1, 6, 15, ?, 45, 66, 91

A

25

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B

26

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C

27

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D

28

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Solution

The correct option is B 28
Clearly, the given sequence follows the pattern : +5, +9, +13, +17, +21, +25, ......
Thus, 1 + 5 = 6, 6 + 9 = 15, .....
so, missing term = 15 + 13 = 28. Hence, the answer is (D).

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