

Corona Smith Inner circle Airstrip One 1689 Posts 
Anyone know a good source for this?
I have MMM by martin gardner, and am looking at the principles of casting out nines. I'd like to find a method for multiplying large numbers mentally. All the best, Corona 
Scott Cram Inner circle 2677 Posts 
Over at Grey Matters, I've linked to some great Mental Math Websites. Also, Harry Lorayne's upcoming Mathematical Wizardry book might have several things along this line.
For sources you can find in a regular bookstore, there's Math Magic by Scott Flansburg, Mathemagics by Arthur Benjamin, and SelfWorking Number Magic by Karl Fulves. More specifically, you may want to look at these tricks for multiplying two 3digit numbers mentally, multiplying any numbers two numbers apart mentally, or some of the tricks over at MathPath. 
Corona Smith Inner circle Airstrip One 1689 Posts 
Thank you scott you are a gem!
Corona 
Corona Smith Inner circle Airstrip One 1689 Posts 
Thank you scott you are a gem!
Corona 
MichelAsselin Veteran user 20th century, 3rd dimension 325 Posts 
If you get Mathemagics, you are in business. It is vastly superior to other books and webbased publications. There is a great chapter on mnemmonnics, and a chapter of readytoperform stunts; including cube root extractions of 6 digits numbers, magic squares, and instant additions of several 4 digits numbers. But ultimately, it is the legitimate mental calculations that you may be after, and Benjamin's method is coherent, consistent and fun (in a perverse way).
" , ? ; !!! "
 Marcel Marceau, Feb 30, 1945. 
Slim King Eternal Order Orlando 17670 Posts 
I just bought MATHEeMAGIC by Vale Heath. Is this a differnt book?
THE MAN THE SKEPTICS REFUSE TO TEST FOR ONE MILLION DOLLARS.. The Worlds Foremost Authority on Houdini's Life after Death.....

Corona Smith Inner circle Airstrip One 1689 Posts 
It is a different book slim,
Scot cram has kindly linked to it on amazon above, I intend to get these books soon: Mathemagics: How to Look Like a Genius Without Really Trying by Arthur Benjamin, Michael B. Shermer Speed System of Basic Mathematics by Jakow Trachtenberg, et al Speed Mathematics Using the Vedic System by Vali Nasser Any thoughts on these? I went through the algebraic porthole of scott's website (which is great by the way!) Corona 
Slim King Eternal Order Orlando 17670 Posts 
Not on those books. I also just bought The Magical Math book by Bob Long and the Lorayne book is on order..PrePaid.
My Daughter, The Bean, just won the Math Challenge in her class yesterday. She will be taking on the rest of the school winners in a few days. She seems pretty confident although there are many students a year or so older. I'm going to link her to Mr. Crams site. It's a good one. I learned THE KNIGHTS TOUR there last week.
THE MAN THE SKEPTICS REFUSE TO TEST FOR ONE MILLION DOLLARS.. The Worlds Foremost Authority on Houdini's Life after Death.....

Corona Smith Inner circle Airstrip One 1689 Posts 
I wonder why children are not taught these methods in schools.
The Bean is lucky to have a Dad whose on the case! All the Best, Corona ps I have miniature knights tours in my wallet, just in case. 
Slim King Eternal Order Orlando 17670 Posts 
OK...Is it the same Matemagics that is on sale here?
http://cgi.ebay.com/ChildrensMATHeMAGIC......ViewItem Book Video and audio?
THE MAN THE SKEPTICS REFUSE TO TEST FOR ONE MILLION DOLLARS.. The Worlds Foremost Authority on Houdini's Life after Death.....

Corona Smith Inner circle Airstrip One 1689 Posts 

Slim King Eternal Order Orlando 17670 Posts 
Are these the same book. Same name ..Same author????? Mine has audio and video too...????
THE MAN THE SKEPTICS REFUSE TO TEST FOR ONE MILLION DOLLARS.. The Worlds Foremost Authority on Houdini's Life after Death.....

Corona Smith Inner circle Airstrip One 1689 Posts 
Yes you are right slim my apologies, shouldn't judge a book by its cover etc
it is the same phew! 
Slim King Eternal Order Orlando 17670 Posts 
You sure? LOL LOL LOL LOL
THE MAN THE SKEPTICS REFUSE TO TEST FOR ONE MILLION DOLLARS.. The Worlds Foremost Authority on Houdini's Life after Death.....

Corona Smith Inner circle Airstrip One 1689 Posts 
Unless that is a kiddies version.
(slightly embarrassed chuckle) 
Algebra2 Regular user CA 156 Posts 
I must say Arthur Benjamin's book is excellent. I never passed Algebra and somehow got through our public education system years later I went back and magic and math tricks especially helped me though courses in college..also Persi Diaconis the mathe teacher at Standford is an excellent mathamagician..

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