Question

the sum of the digits of a certain two digit number is 3. when you reverse its digits you decrease the number by 9. what is the number

Answer 1

21

Explanation:

Find out all the combinations

3 0 + 3 = 3 Reversed 30

12 1 + 2 = 3 21

21 2 + 1 = 3 12 <-----------------

30 3 + 0 = 3 3

Then consider what the Question is Asking

And apply it to each of the combinations

Then Use trial and error to find the answer