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15, 30, 55, 90, ?, 210

Find out the missing number in the following number series. Q. 15, 30, 55, 90, ?, 210 A.125 B.135 C.145 D.155 E.165 Sol: 15 + 5 * 3 = 30 30 + 5 * 5 = 55 55 + 5 * 7 = 90 90 + 5 * 11 = 145 145 + 5 * 13 = 210

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11, 24, 63, 193, 680.5, ?

Find out the missing number in the following number series. Q) 11, 24, 63, 193, 680.5, ? A.2718 B.2738 C.2748 D.2728 E.2758 Sol: 11 * 2 + 2 = 24 24 * 2.5 + 3 = 63 63 * 3 + 4 = 193 193 * 3.5 + 5 = 680.5 680.5 * 4 + 6 = 2728

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