**Fido claims that he can read our mind.**

**Click at the following link to test him out!!! :**

**http://www.digicc.com/fido/**

**There are several ways to explain Fido's trick, u**

**sing mathematical reasoning.**

*Make an attempt to use ALGEBRA to explain the "trick"?*
Enter your thinking (algorithm) in Comments.

:D FIDO~~~

ReplyDeleteThis trick was in Think Like a Math Genius.

DeleteMay I ask who are you?

Delete@Cheryl - Ding Wen is your senior in Sec 3 this year :)

DeleteLet x be the total of the digits input in the page and y be the digit circled.

ReplyDeleteThe formula for the method is:

1~8

2~7

3~6

4~5

5~4

6~3

7~2

8~1

9~9

0~9

Following the formula above, an example:

Assuming x is 123456

1+2+3+4+5+6=21

2+1=3

So since 3~6, the answer will be 6.

You can try my method if u want.

(It might not be explaining in algebra, but I tried my best!)