In the following number series, two numbers have been put within brackets. Select the most appropriate option for these numbers in relation to their inclusion in the series.
0,7, 26, (65), 124, 215, (344), 511
Answer & explanation
Correct answer: option 1
0,7, 26, (65), 124, 215, (344), 511
The logic;
0 → \( {1 }^{3 } \)-1
7 → \( {2 }^{3 } \)-1
26 → \( {3 }^{3 } \)-1
(63) → \( {4 }^{3 } \)-1
124 → \( {5 }^{3 } \)-1
215 → \( {6 }^{3 } \)-1
(342) → \( {7 }^{3 } \)-1
511 → \( {8 }^{3 } \)-1
Thus,
(65) should be 63 and (344) should be 342
Therefore, Both the bracketed numbers are incorrect.