Question 1003111: The sum of the digit of a certain two digit number is 7. Reversing its digits increases the number by 9. What is the number? Answer by solver91311(24713) (Show Source):
The difference when reversing the digits of any two digit number is always a multiple of 9. So the difference is a number of the form 9x and x is the difference between the two digits. So you need to find two single digit numbers that have a sum of 7 and a difference of 1, and then your number will be formed by the smaller of these two numbers followed by the larger.
John
My calculator said it, I believe it, that settles it
