gwd-12-3

periodic

Q3:

What is the remainder when the two-digit, positive integer x is divided by 3 ?

(1) The sum of the digits of x is 5.

(2) The remainder when x is divided by 9 is 5.

Ans. D : My ans. is B

Since (1), pairs are (1,4), (4,1), (2,3), (3,2) & (5,0), thus remainder will be 0, 1 & 2

Form (2), X=9k+5, thus remainder must be 2 (unique)

Help!!!

apply1

你的这个是怎么推算的Since (1), pairs are (1,4), (4,1), (2,3),

(3,2) & (5,0), thus remainder will be 0, 1 & 2

14、41、23、32、50他们除以3的余数都是2呀，你再想想。

periodic

thanks !!!