Question 29

Select the number that can replace the question mark (?) in the following series.

8, 13, 23, 43, ?, 163, 323

Solution

The given series is 8, 13, 23, 43, ?, 163, 323

The difference of the numbers is becoming twice as shown below

The next difference should be 40.

Let the required number = a

$$\Rightarrow$$ a - 43 = 40

$$\Rightarrow$$ a = 83

$$\therefore\ \ $$Required number = 83

Hence, the correct answer is Option C

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