P and Q are both positive integers. When P is divided by Q, the remainder is some positive integer D, and when P is divided by (Q + 6), the remainder is also D. If P/Q = 1020.75 and P/(Q + 6) = 816.6, then which of the following gives the correct set of {D, Q}? Choose the correct option:
A) {6, 12} B) {6, 15} C) {9, 12} D) {9, 15} E) {18, 24}
p/q= d=p/q+6   d= .75 q   d= .6(q+6)   we get d = 18 and q = 24. Answer = {18, 24}.
<result>E</result>
P and Q are both positive integers. When P is divided by Q, the remainder is some positive integer D, and when P is divided by (Q + 6), the remainder is also D. If P/Q = 1020.75 and P/(Q + 6) = 816.6, then which of the following gives the correct set of {D, Q}?