Читать книгу School RULES! Math - Emma MacLaren Henke - Страница 18

Mind Reader

1. To prepare for this trick,

write the number 73 on a slip of

paper and put the paper in your pocket.

2. Then ask a friend to choose any 4-digit number and remember it.

3. Tell her to type her number into your calculator

twice in a row. (For example, if she chose 3,356,

she enters 33563356.)

4. Then tell your friend to divide the number

she entered by 137.

5. Finally, tell her to divide the number she has

now by her original 4-digit number.

6. Take the paper from your pocket, unfold it,

and ask, “Is this the number you see on

the calculator?”

The calculator

will read 73,

just like your

paper!