In the following question write which number in sequence replaces the question mark?
$?, 17, 33, 51, 85$

9

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13

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8

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11

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Solution

The correct option is D $11$
The given sequence follow a pattern :
$2 \times 5 + 1 = 11$
$3 \times 5 + 2 = 17$
$6 \times 5 + 3 = 33$
$11 \times 5 - 4 = 51$
$18 \times 5 - 5 = 85$
Hence, option D is correct.

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