Think of a number with two digits. For example, 43. Follow the Magic Gopher's instructions and he will amaze you by telling you what number you chose.

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### Discussion

Did he get your number right? How does he do it?!

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princessred124 10 November, 2013 - 16:51

Everytime it changes the symbol of multiple of 9. Whenever we plus the two digits numbers and minus with the original numbers the answer which comes is always multiple of 9. He knows what is the multiple of 9 and shows the symbol to you........Simple and easy!!!! Watch carefully and you'll understand it

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Apocalypse 6 November, 2013 - 10:36

I got it. All your answers can be divided by 9. He uses one symbol for all of these numbers and shows it to you.

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Jonathan - Coor... 11 October, 2013 - 05:25

Hi avhie18! Have you worked out what the trick is? :)
Jonathan (LearnEnglish Teens Team)

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Jonathan - Coor... 3 October, 2013 - 02:25

Hi Yassine! Good guess but let me assure you that Magic Gopher doesn't use the camera. Can you think of another explanation ... ? I hope you enjoy solving this puzzle.
Jonathan (LearnEnglish Teens Team)

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FAFMIR 18 September, 2013 - 18:40

The trick to the game is that the gopher uses the same symbol for every multiple of 9, from 0 through 81 (it is impossible to get a higher number using only two digits). The gopher assigns the same symbol to the multiples of 9 as to other non-multiples of 9 in order to cover up the trick; the symbol picked for each game is randomized. No matter which two-digit integer the player chooses, when the subtraction is done, the resulting number will always be a multiple of 9. In fact, no matter which (nonnegative) integer the player chooses, the result will always be a multiple of 9. The former can be proven using elementary algebra. Be aware that the proofs for n digits rely on that the digits of the number n\, are indexed with the rightmost digit being assigned position 0, with the adjacent digits (to the left) having an index increasing by one each time. For example, for the number '261', the digit '1' is in position 0, '6' is in position 1, and '2' is in position 2.

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prabha55 10 September, 2013 - 18:59

there is no magic ,always we get total of our numbers is 9, so it will always get the symbol of 9 number. if you want to check one more time you will check the symbol of 9 .it is very funny magic

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goodgirl 7 August, 2013 - 22:46

no that's not magic he doesn't read mind it's just a very good trick that's all if you take any nember composed of 2 nembers like he said you always get 9 or 18 or 27 or 36 or 45 or 54 or 63 or 72 or 81 ...... and all those nembers have the same symbol next to it that's why gopher always get it right

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subsrijei 3 July, 2013 - 15:59

this dude is really amazing at how he can figure out your symbol when you do not click your numbers symbol.

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