The number is 84. If you find numbers that equal 12 that are both one digit numbers, you have 9 and 3, 8 and 4, and 7 and 5. If you put 48, together they equal 12. If you divide 84 by 7, you will get 12. 84 reversed is 48, which is 4 times 12. So if you times 84 by 4/7, you will get 48.
