Q32: What is the remainder when the positive integer x is divided by 8?
(1) When x is divided by 12, the remainder is 5.
(2) When x is divided by 18, the remainder is 11.

答案是E。 但如何分析突破更重要。

(1)x=12m+5

(2)x=18n+11

8=2^3

给出的条件12 18都不是8的倍数，它俩的公倍数36也不是8的倍数。所以无法

得知此数除8的余数。