If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y = ? Options:
A) 6 B) 4 C) 8 D) 8 E) None of these
80 = 2 x 5 x 8   Since 653xy is divisible by 2 and 5 both, so y = 0.   Now, 653x is divisible by 8, so 13x should be divisible by 8.   This happens when x = 6.   x + y = (6 + 0)= 
<gadget id="calculator">(6 + 0)</gadget>
<output>6</output>
6.   6nswer: 6
<result>A</result>
If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y = ?