Question : Directions: In the following question a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
5, 9, 13, 17, ?, 25
Option 1: 27
Option 2: 23
Option 3: 21
Option 4: 19
Correct Answer: 21
Solution :
Given:
5, 9, 13, 17, ?, 25
In the given series, add 4 to the previous term to get the next term.
5 + 4 = 9; 9 + 4 = 13; 13 + 4 = 17; 17 + 4 = 21; 21 + 4 = 25
So, the missing number is 21. Hence, the third option is correct.
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