Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
25, 26, 28, 32, 40, ?
Option 1: 50
Option 2: 56
Option 3: 58
Option 4: 52
Correct Answer: 56
Solution :
Given:
25, 26, 28, 32, 40, ?
Add twice the difference between the previous number in the next number –
25 + 1 = 26
26 + (1 × 2) = 26 + 2 = 28
28 + (2 × 2) = 28 + 4 = 32
32 + (2 × 4) = 32 + 8 = 40
40 + (2 × 8) = 40 + 16 = 56
So, the required missing number in the series is 56. Hence, the second option is correct.
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