Question 32

Select the number that can replace the question mark (?) in the following series.
8, 11, 15, 23, 40, 73, ?

Solution

Given series is 8, 11, 15, 23, 40, 73, ?

The logic here is difference of differences of the numbers are the consecutive squares as shown below

The next square number will be 25 and the difference between required number and 73 should be 58.

$$\therefore\ $$Required number = 73 + 58 = 131

Hence, the correct answer is Option B

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Select the number that can replace the question mark (?) in the following series.8, 11, 15, 23, 40, 73, ?