If the remainder is 7 when positive integer n is divided by 10, what is the remainder when n is divided by 5?
Choose the most appropriate option.
A) 0 B) 1 C) 2 D) 3 E) 2
Assume x is quotient here,   n=10x+7 ----------(1)   and n=5x+ ?   We can also write equation (1) as:   n=(10x+5)+2.   ie 5(2x+1)+1 ie the first term is perfectly divisible by 5.   So,the remainder left is 2   So,answer (2) is right choice.
<result>E</result>
If the remainder is 7 when positive integer n is divided by 10, what is the remainder when n is divided by 5?