Question: If N = (n 1) (n + 1) is divisible by 8, then n is certainly: (a) An even natural number (b) An odd

If N = (n – 1) (n + 1) is divisible by 8, then n is certainly:

(a) An even natural number

(b) An odd natural number

(c) Any natural number

(d) Any rational number

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