Q and R are two-digit positive integers that have the same digits but in reverse order. If the positive difference between Q and R is less than 70, what is the greatest possible value of Q minus R?	Choose the correct choice from the following options:  A) 63  B) 64  C) 65  D) 66  E) 67
A two-digit integer "ab" can be expressed algebraically as 10a+b.   Q-R=(10a+b)-(10b+a)=9(a-b)&lt;70.   The greatest multiple of 9 which is less than 70 is 63.   The answer is 63.
<result>A</result>
Q and R are two-digit positive integers that have the same digits but in reverse order. If the positive difference between Q and R is less than 70, what is the greatest possible value of Q minus R?