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B
127
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C
559
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D
All of these
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Solution
The correct option is C All of these For n=1 76n−66n=76−66 =(73)2−(63)2 =(73−63)(73+63) =(343−216)×(343+216) =127×559 =127×13×43 Clearly it is divisible by 127,13 as well as 559.