tens digit of n?askaichin wrote:What is the tens digit of a certain positive integer n?
1. When n is divided by 230, the remainder is 30.
2. When n is divided by 200, the remainder is 30.
1. When n is divided by 230, the remainder is 30.
when n = 260, reminder is 30
tens digit = 6
when n= 30, reminder is 30
tens digit = 3
2 different answers.. Hence INSUFF
2. When n is divided by 200, the remainder is 30
n= 200Q+30
n= 30,230,430,630...
tens digit is always 3.
SUFF
pick B
