How old will Mr. Jones be p years from now if he was q years old r years ago?
A. p + q - r
B. -p + q + r
C. p - q - r
D. p + q + r
E. p / q * r
Mr. Jones is presently (q + r) years old.
Therefore, he will be (p + q + r) years old p years from now.
If the problem appears confusing, choose an easy set of numbers,
e.g., p = 7; q = 50 and r = 3.
Then, Mr. Jones was 50 years old 3 years ago.
Therefore, he is 53 and will be 60 years old 7 years from now.
Note that p + q + r = 7 + 50 + 3 = 60.