If the remainder is 11 when the integer n is divided by 20, what is the remainder when 2n is divided by 10?
Select the correct option
A) 0  B) 1  C) 2  D) 3  E) 4
n = 20k+11   2n = 2(20k+11) = 4k*10 + 22 = 4k*10 + 2*10 + 2 = 10j + 2   The answer is 2.
<result>C</result>
If the remainder is 11 when the integer n is divided by 20, what is the remainder when 2n is divided by 10?