Question : Directions: Select the option that is correct for the bracketed numbers with respect to their inclusion in the given series.
4, 11, 30, (67), 128, 219, (346), 515
Option 1: The first bracketed number is incorrect and the second bracketed number is correct
Option 2: Both the bracketed numbers are correct
Option 3: Both the bracketed numbers are incorrect
Option 4: The first bracketed number is correct and the second bracketed number is incorrect
Correct Answer: Both the bracketed numbers are correct
Solution :
Given:
4, 11, 30, (67), 128, 219, (346), 515;
The pattern is as follows –
(1)
3
+ 3 = 1 + 3 = 4
(2)
3
+ 3 = 8 + 3 = 11
(3)
3
+ 3 = 27 + 3 = 30
(4)
3
+ 3 = 64 + 3 = 67
(5)
3
+ 3 = 125 + 3 = 128
(6)
3
+ 3 = 216 + 3 = 219
(7)
3
+ 3 = 343 + 3 = 346
(8)
3
+ 3 = 512 + 3 = 515
From the above, it is evident that both the bracketed numbers (67), and (346) are correct. Hence, the second option is correct.
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