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What should come in place of the question mark (?) in the following number series.12 6.5 7.5 12.75 27.5 71.25 ? (a) 225.75 (b) 216.75 (c) 209.75 (d) 236.75 (e) 249.75 |
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Answer» (b) The given number series is based on the following pattern: 12 × 0.5 + 0.5 = 6.5 6.5 × 1 + 1 = 7.5 7.5 × 1.5 + 1.5 = 12.75 12.75 × 2 + 2 = 27.5 27.5 × 2.5 + 2.5 = 71.25 ? = 71.25 × 3 + 3 = 213.75 + 3 = 216.75 Hence, 216.75 will replace the question mark. |
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