TT gwd-5-13,又是remainder,总是出错，郁闷！！！

what is the remainder when the positive integer n is divided by 3?

1) the remainder when n is divided by 2 is 1.

2) the remainder when n+1 is divided by 3 is 2.

I choose C,but of coz, i was wrong....

it's already not the first time i made mistake in such question, do you xdjm have good method to solve this question..

B是正确的阿

n+1/3the remainder is 2

so n/3 the remainder is 1

chose B

yup,,thank u kallyli and mymengming.