(232+1) is exactly divisible by a certain number, then which of the following is also divisible by the same number
a) 296+1
b) 216+1
c) 216-1
d) 7 ×232
Sol:
2⁹⁶ + 1
= (2³²) + (1)³ = (2³² + 1) (2⁶⁴ + 1 + 2³²)
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