Question : Directions: Which number from among the given options can replace the question mark (?) in the following series?
8, 11, 22, ?, 50, 53
Option 1: 37
Option 2: 42
Option 3: 35
Option 4: 25
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Correct Answer: 25
Solution :
Given:
8, 11, 22, ?, 50, 53
Add 3, and multiply 2 alternately to the numbers to obtain the next number of the series.
8 + 3 = 11; 11 × 2 = 22; 22 + 3 = 25; 25 × 2 = 50; 50 + 3 = 53
So, 25 is the missing number in the series. Hence, the fourth option is correct.
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