Question
35 36 68
207 836 4205 In each of these questions a number series is given. In each series only one number is wrong. Find the wrong number.Solution
The series is 35 × 1 + 1² = 36, 36 × 2 - 2² = 68, 68 × 3 + 3² = 213, 213 × 4 - 4² = 836, 836 × 5 + 5² = 4205 Hence there should be 213 in place of 207.
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