Question
Find the wrong number in the given number series,
31, 55, 91, 145, 217, 307Solution
37 + 9 × 2 = 55 55 + 9 × 4 = 91 91 + 9 × 6 = 145 145 + 9 × 8 = 217 217 + 9 × 10 = 307 So, 37 should come in place of 31.
Complete the series by replacing ‘?’
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