答案 11
括号拆开得8!+9*8!+6*8!=16*8! 分解质因数 含有2的11次方
【余数 (Remainders) 】

8.一道题考7的14次幂的个位数是多少
答案 9
从7的1次方个位数字算起 依次为 7 9 3 1的循环 14除以4余2 在第二个位置 为9

9.p is the sum of 3 consecutive integers a b c and the product of 3 consecutive integers x y z, what is the remainder when p is divided by 5
(1) the remainder is 1 when a is divided by 5
(2) the remainder is 1 when x is divided by 5
答案 D
条件一 (5n+1)(5n+2)(5n+3) 除了常数项6 都为5的倍数 所以余1不会变
条件二 (5n+1)+(5n+2)+(5n+3)=15n+6 同上