The ratio of spinsters to cats is 2 to 9. If there are 63 more cats than spinsters, how many spinsters are there?  Choices.
A) 10
B) 12
C) 14
D) 16
E) 18

Rationale: "let 2 x be the number of spinsters . then 9 x is the number of cats . 9 x - 2 x = 63 x = 9 and the number of spinsters is 2 ( 9 ) = 18 . the answer is e ."
Answer: E