Mnementh
<font color=red>I like the Steelers <b>almost</b>
- Joined
- Aug 8, 2006
- Messages
- 5,210
Angel, the short answer is that the sum of numbers that you got by subtracting the two numbers will always be divisible by 9. So after leaving out the one that you circled (if you circle a 0 it will screw everything up tho) you add the remaining numbers until you get a single digit number. The difference between that number and 9 is the number you circled.
For example:
6543-3456 = 3087
If you circle the 8 then you are left with 307. 3+0+7 = 10. 1+0 = 1. 9-1 = 8, which is the number you circled. If you circled the 3 then 0+8+7 = 15, 1+5 = 6, 9-6 = 3. If you circled the 7 then 3+0+8 = 11, 1+1 = 2, 9-2 = 7.
Jumbling the numbers is irrelevant since you are adding them.
It really is pretty simple as long as you know what the trick is![]()
Ah, a fellow math nerd. Good to see!

I figured that much out, though one thing still eludes me... WHY is it that when you subtract those two numbers, the result is always divisible by 9?