Multiple choice Which of the following numbers will completely divide (817 - 1) 8 10 14 16 Reveal answer Fill a bubble to check yourself B Correct answer Explanation (Xn-1) will be divisible by (x + 1) only, when n is even.(817 - 1) =(92)7-1,which is divisible by (9 + 1), i. e. 10.