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Dick Christian
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Inner circle
Northern Virginia (Metro DC)
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Profile of Dick Christian
Glad some of you like the presentation I use.

For Iain: by first telling spectator 4 what is required (i.e., ability to add three 3 digit numbers correctly) and adding the suggestion "you might have your neighbor check your addition" (some have actually done so) I've yet to have anyone get the total wrong in probably 1,000 or more performances. However, one of the beauties of my presentation is that if the spectator makes a mistake, I am in a position to correct him/her without giving away the method, simply by having them -- or someone else -- recheck their math. (I would have thought that some readers might have figured that out.) Naturally you do NOT want to identify the three numbers or the other participants will realize that they are not the numbers they wrote.
Dick Christian
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Eternal Order
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Profile of IAIN
Dick - I was just messing about with my post about blurting out the "that's wrong!" thing...
I've asked to be banned
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Profile of mdspark
I basically use Max Mavens outline for the effect from Prism. Each of 2 or 3 persons gives a 2 digit number...I make the numbers relatively easy to add. I put conditions on their choice...

1st person: a number between 10 and 50

2nd person: a number between 50 and 100

3rd person: a two digit number, both digits the same.
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Profile of Drewmcadam
Mr Mindbender said << The first moment of possible prevention is putting the adding in the hands of someone who seems and feels comfortable doing the math. >>

I did this recently with a company of top-grade accountancy experts... Guess what. The fun thing was, the boss told him to report to his office the following morning!
Mentalist Sam
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Profile of Mentalist Sam
On 2010-09-13 13:27, Caliban wrote:
Another point that hasn't been mentioned is to use numbers that are very easy to add up. If the digits in the column are 1+3+0 then they are less likely to get it wrong than they would be if the digits were 7+8+5.

This is similar to what Banachek recommends. Make it easy for them to add. Keep the numbers under 10 so that they don't have to carry the number over. If you have Banachek's DVDs, he goes into detail on this and has the workings of a great/simple add-a-no pad made from index cards and rubber bands.
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