Process


 * Missing week 3 0points

1. Read the instructions, cut them and paste them to your wiki. Underline the words that are time markers. __Think__ of a 2-digit integer. __Subtract__ from the number the sum of its digits and __find__ the result in the table below. Note that each cell of the table contains a number and a geometric shape. __Concentrate__ hard on the shape that shares a cell with the result of your calculations. __When ready__, press the "Check it!" button ...

2. Play and try to explain why the magic trick worked. To be honest i've seen this trick before so i know how it works, giving any number for example 37, you can write this number as 3 time 10 plus 1 time 7 (3x10 + 7), if from this you subtract 3 + 7 you will get as a result 3x10 -3, for any other number you will subtract 1 for every time you have to multiply by 10, that is a multiple of nine, all the multiple of nine that where in the table had the same shape. But as i say before i have already seen this trick before, all thought i remember that the first time i saw it i couldnt figure out.

3. ** Check the explanation below the trick. Was it the one you were thinking of? Explain. Yea its the same explanation, note how they separate the number ab as 10 times a plus 1 times b, this is true for any, number for example 1073 : 1000 x 1 + 100x0 + 10x7 + 1x3. And when you do the product there you can see its a multiple of nine, they wrote it way better than i did.