When divided by 5, x has a remainder of 3 and y has a remainder of 1. Which of the following could be the remainder when x + y is divided by 10?  Options.
A) 6	B) 7	C) 8	D) 9	E) 0
x = 5k+3 and y = 5j+1   x+y = 5(j+k) + 4   When divided by 10, the remainder is either 4 or 9.   The answer is 9.
<result>D</result>
When divided by 5, x has a remainder of 3 and y has a remainder of 1. Which of the following could be the remainder when x + y is divided by 10?