What should come in place of the question mark (?) in the following number series? 18 38 120 ? 2480 14910
What should come in place of the question mark (?) in the following number series?
18 38 120 ? 2480 14910
(a) 394
(b) 450
(c) 492
(d) 486
(e) None of these
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(c) The given number series is based on the following pattern:
18 × 2 + 2 × 1 = 38
38 × 3 + 3 × 2 = 120
120 × 4 + 4 × 3 = 492
492 × 5 + 5 × 4 = 2480
2480 × 6 + 6 × 5 = 14910
Hence, 492 will come in place of the question mark.
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