Amaze your friends, well maybe amaze is too strong a word

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The discussion revolves around a number trick where one person writes down a 3 or 4-digit number, rearranges it, and performs a subtraction to arrive at a result. The trick allows the other person to guess a circled digit from the result based on the remaining digits. Participants engage in testing the trick, with one user successfully guessing a circled digit. Another user introduces a similar number guessing game, specifying conditions for selecting a two-digit odd number. The conversation highlights the enjoyment of mathematical tricks and the playful challenge among participants, with a hint of competition to see who can guess correctly. There is also a mention of a user recalling a similar trick from a TV show, adding to the lighthearted nature of the exchange.
tribdog
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Here's a neat little trick I just learned:
Tell your friend to write down a 3 or 4 digit number, but don't let you see it (it can actually be any number of digits over 2, but if your friends are like mine they get confused easily). Tell them to use a variety of different numbers. Let's say our friend picks 1234. Now tell them to rearrange those digits into a new number, like 4321 or 2143 or 3241 etc, again don't let you see it. Let's say they pick 4123. Now tell them to subtract the small one from the big one. 4123-1234=2889. Now tell them to circle one of the digits in their answer, but don't circle a 0, cause it's already a circle. We'll say they circle the 9, tell them to take the uncircled digits and rearrange them and tell you that number, 288 or 828 etc. and you will tell them what digit they have circled. Someone want to try? Then I'll tell you how it's done, although once you look at it closely you'll probably figure it out. It is pretty neat though.
 
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OK! I've got an number and did the calculations.. now what? The final number is 8.
 
Originally posted by Monique
OK! I've got an number and did the calculations.. now what? The final number is 8.

Then you circled a 1
 
correct! You are the new oracle??
 
Just call me "Nostrildumbass"
should I say how the trick is done, or should I let people try to figure it out?
 
Let's wait a while and see who else want to test your mighty brain :P

I've got one too: you should follow your initial hunch!

Pick a two digit number between 1 and 50
The number cannot have two digits the same,
It can only be an ODD number.
 
Last edited:
Originally posted by Monique
Let's wait a while and see who else want to test your mighty brain :P

I've got one too: you should follow your initial hunch!

Pick a number between 1 and 50
The number cannot have two digits the same,
It can only be an ODD number.

alright I've got one.
 
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is it a two digit number? it should have two digits
 
let me check, one, two. yep two digitss
 
  • #10
Originally posted by Monique
37!
wow, amazing, wrong, but amazing

sorry, I think I misread your instructions. I just picked an odd number, you meant both digits have to be odd right? sorry. plus I saw this trick on some TV show. so I shouldn't have even participated, and once participating I shouldn't have screwed it up.
 
  • #11
Tribdog I need to know your trick so I can perform it
 
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