Question
18, 30, 54, 90, 138,
? What will come in place of the question mark (?) in the following series?Solution
ATQ, 18 + 12 × 1 = 30 30 + 12 × 2 = 54 54 + 12 × 3 = 90 90 + 12 × 4 = 138 138 + 12 × 5 = 198
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