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 60, what is the greatest possible value of Q minus R?	Options.
A) 52 B) 54 C) 55 D) 56 E) 58
A two-digit integer "ab" can be expressed algebraically as 10a+b.   Q-R=(10a+b)-(10b+a)=9(a-b)&lt;60.   The greatest multiple of 9 which is less than 60 is 54.   The answer is 54.
<result>B</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 60, what is the greatest possible value of Q minus R?