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.
1, 8, 27, 64, 125, 216, ?
Option 1: 354
Option 2: 343
Option 3: 392
Option 4: 245
Correct Answer: 343
Solution :
Given:
1, 8, 27, 64, 125, 216, ?
The numbers of the series are cubes of consecutive natural numbers –
1
3
= 1; 2
3
= 8; 3
3
= 27; 4
3
= 64; 5
3
= 125; 6
3
= 216; 7
3
= 343
So, the missing number is 343. Hence, the second option is correct.
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