Question
12, 20, 36, ?, 132,
260 What should come in place of question mark (?) in the following number series?Solution
12 x 2 - 4 = 20 20 x 2 - 4 = 36 36 x 2 - 4 = 68 68 x 2 - 4 = 132 132 x 2 - 4 = 260
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