Question
What will come in place of the question mark (?) in the
following series? 5, 15, 35, 75, 155, ?Solution
ATQ,
5 × 2 + 5 = 15
15 × 2 + 5 = 35
35 × 2 + 5 = 75
75 × 2 + 5 = 155
155 × 2 + 5 = 315
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