The positive two-digit integers p and q have the same digits, but in reverse order. Which of the following must be a factor of p + q?	Choose the correct choice from the following options
A) 66
B) 9
C) 10
D) 12
E) 14
Remember: When you take the difference between the two, it will always be 9. e.g 23-32=9, 89-98=9   and when you add both integers, the sum will always be a multiple of 11 e.g 23+32=55, 89+98= 187   66 is multiple of 11   66nswer : 66
<result>A</result>
The positive two-digit integers p and q have the same digits, but in reverse order. Which of the following must be a factor of p + q?