Question 25

Which number in the given series is Incorrect?
3, 7, 15, 27, 53, 63

Solution

$$7-3=1×4$$

$$15-7=2×4$$

$$27-15=3×4$$

$$43-27=4×4$$

$$63-43=5×4$$

So, it should be 43 instead of 53 in the given series.

A is correct choice.

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Which number in the given series is Incorrect?3, 7, 15, 27, 53, 63