Question
Find the wrong number in the given number series.
21, 31, 11, 41, 1, 61Solution
ATQ,
21 + 10 × 1 = 31
31 – 10 × 2 = 11
11 + 10 × 3 = 41
41 – 10 × 4 = 1
1 + 10 × 5 = 51
So, 51 should come in place of 61.
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