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, 8, 27, ?
Option 1: 37
Option 2: 47
Option 3: 57
Option 4: 64
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Correct Answer: 64
Solution :
Given:
1, 8, 27, ?
The series contains terms that are cubes of consecutive natural numbers.
1
3
= 1; 2
3
= 8; 3
3
= 27; 4
3
= 64
So, the missing number is 64. Hence, the fourth option is correct.
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