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24. | Which of the following numbers will completely divide (4915 - 1) ? | |
A. | 8 | |
B. | 14 | |
C. | 46 | |
D. | 50 | |
Answer: Option A | |
Explanation: | |
(xn - 1) will be divisibly by (x + 1) only when n is even. (4915 - 1) = {(72)15 - 1} = (730 - 1), which is divisible by (7 +1), i.e., 8. |
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