Question : Directions: In the following question a series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
11, 13, 17, 19, 23, 25, ?
Option 1: 25
Option 2: 27
Option 3: 29
Option 4: 31
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Correct Answer: 29
Solution :
Given:
11, 13, 17, 19, 23, 25, ?
Add 2 and 4 alternatively to the terms of the series –
11 + 2 = 13; 13 + 4 = 17; 17 + 2 = 19; 19 + 4 = 23; 23 + 2 = 25; 25 + 4 = 29
So, 29 is the missing number. Hence, the third option is correct.
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