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.
1, 2, 5, 26, ?
Option 1: 677
Option 2: 252
Option 3: 526
Option 4: 125
Correct Answer: 677
Solution :
Given:
1, 2, 5, 26, ?
Add 1 to the square of each previous term to obtain the next term in the series.
1
2
+ 1 = 2; 2
2
+ 1 = 5; 5
2
+ 1 = 26; 26
2
+ 1 = 677
So, 677 is the missing term in the series. Hence, the first option is correct.
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