6, 2, 12, 6, 20, 12, 30, 20, ? ?

49, 36

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42, 30

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36, 42

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48, 54

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Solution

The correct option is D 42, 30
It is compound series of two different series
6, 12, 20, 30, ?
$6 + 6 = 12 + 8 = 20 + 10 = 30 + 12 = 42$
& 2, 6, 12, 20, ?
$2 + 4 = 6 + 6 = 12 + 8 = 20 + 10 = 30$
so answers will be $42$ & $30$

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2, 30, 6, 20, 12, 12, (?)

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2, 6, 12, 20, 30, 42, . . . . . .

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