Discussion
Which of the following will not be a number of the series 1, 8, 27, 64, 125,.....?
Answer: A
Correct answer: 256
The series is the perfect cubes: \( 1^3, 2^3, 3^3, 4^3, 5^3 \), continuing \( 6^3=216 \), \( 7^3=343 \), \( 8^3=512 \), \( 9^3=729 \), \( 10^3=1000 \). 256 is \( 2^8 \) and not a cube, so it cannot belong.
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