YOU EITHER GET IT OR YOU DONT

i seen this before simple trick,5 numbers in 5 colours in the grid,pick a number,tell them what colour group it's from, (select a colour from the page where there are lots of colours is a decoy round), then tell them which house its in, its already put each of the 5 numbers in your colour group into a diferrent house and also the houses are diferrent colours,(the crystal ball round is another deycoy round) then click on any door and it will give you the number its worked out by elimination first,(you're basically telling it your number as you go) Sorry for sounding all clever but couldn't resist as had to work out a very similar in a quizz type thing