Question
What should come in place of (?) question mark in the given number series. 81, 73, 66, 60, 55, ?
Solution
ATQ, Check the differences: 81 → 73 = -8 73 → 66 = -7 66 → 60 = -6 60 → 55 = -5 Next should be: 55 → ? = -4 So, 55 - 4 = 51 Answer: 51
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