prep DS2 No.123 这种题有啥规律阿？请教高人

cherryshang

When positive integer n is divided by 3, the remainder is 2; and when positive integer t is divided by 5, the remainder is 3.  What is the remainder when the product nt is divided by 15 ?

 

(1) n - 2 is divisible by 5.

 

(2) t is divisible by 3.