If the remainder is 11 when positive integer n is divided by 18, what is the remainder when n is divided by 9?	Pick one.
A) 0 B) 2 C) 1 D) 3 E) 4

Rationale: "assume x is quotient here , n = 18 x + 11 - - - - - - - - - - ( 1 ) and n = 9 x + ? we can also write equation ( 1 ) as : n = ( 18 x + 9 ) + 2 . ie 9 ( 2 x + 1 ) + 2 ie the first term is perfectly divisible by 6 . so , the remainder left is 2 . so , answer ( b ) is right choice ."
Answer: B