23, 21, ?, 118, 470, 2348

23, 21, ?, 118, 470, 2348

23, 21, ?, 118, 470, 2348

A.20

B.30

C.40

D.70

E.90

Sol:

23 * 1 – 2 = 21

21 * 2 – 2 = 40

40 * 3 – 2 = 118

118 * 4 – 2 = 470

470 * 5 – 2 = 2348

quantitative aptitude
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