@noms, relax bro. take it easy. If you don't mind I can explain the puzzle.
You see its just a fixed number game, and how it works? If you see the example at the end of the page, where he takes two numbers, 2 and 3. He adds them 2+3=5, and then subtracts it from 23, so the result is 18. Now, what you have to do it everytime, look at the symbol next to 18 and click on the ball. You will see the symbol changes and whatever the symbol appears on the number 18, is the right answer. Just match all the symbols that are equal to the symbol of 18, you should see other numbers that have the same symbol as 18, eg. no. 27, 36, 45..... and so on. The result will always come on the same pattern. Try it.