The greatest number of which \( 6^{n}-5 n-1 \) is always divisible, is (where \( n \in N \) )....

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The greatest number of which \( 6^{n}-5 n-1 \) is always
P
divisible, is (where \( n \in N \) )
(1) 5
(2) 25
(3) 50
(4) 75


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