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frontpagephoinix | Staff posted Oct 04, 2025 08:34 AM
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frontpagephoinix | Staff posted Oct 04, 2025 08:34 AM

Secrets of Mental Math (eBook)

$2.00

$9.99

79% off
Amazon
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Various Retailers have Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (eBook) on sale for $1.99.

Thanks to Deal Hunter phoinix for finding this deal.

Available Retailers: About this title:
  • Authors: Arthur Benjamin & Michael Shermer
  • Foreword by Bill Nye
  • Page Length: 296 pages
  • Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friends—and yourself—with incredible calculations you never thought you could master, as renowned "mathemagician" Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks. This book will teach you to do math in your head faster than you ever thought possible, dramatically improve your memory for numbers, and—maybe for the first time—make mathematics fun.
  • Yes, even you can learn to do seemingly complex equations in your head; all you need to learn are a few tricks. You'll be able to quickly multiply and divide triple digits, compute with fractions, and determine squares, cubes, and roots without blinking an eye. No matter what your age or current math ability, Secrets of Mental Math will allow you to perform fantastic feats of the mind effortlessly. This is the math they never taught you in school.

Editor's Notes

Written by johnny_miller | Staff
  • About this product:
    • 4.6 out of 5 stars rating at Amazon based on over 2,200 customer reviews
  • About this store:
  • Additional Note:
    • Please see the original post for additional details & give the forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Various Retailers have Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (eBook) on sale for $1.99.

Thanks to Deal Hunter phoinix for finding this deal.

Available Retailers: About this title:
  • Authors: Arthur Benjamin & Michael Shermer
  • Foreword by Bill Nye
  • Page Length: 296 pages
  • Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friends—and yourself—with incredible calculations you never thought you could master, as renowned "mathemagician" Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks. This book will teach you to do math in your head faster than you ever thought possible, dramatically improve your memory for numbers, and—maybe for the first time—make mathematics fun.
  • Yes, even you can learn to do seemingly complex equations in your head; all you need to learn are a few tricks. You'll be able to quickly multiply and divide triple digits, compute with fractions, and determine squares, cubes, and roots without blinking an eye. No matter what your age or current math ability, Secrets of Mental Math will allow you to perform fantastic feats of the mind effortlessly. This is the math they never taught you in school.

Editor's Notes

Written by johnny_miller | Staff
  • About this product:
    • 4.6 out of 5 stars rating at Amazon based on over 2,200 customer reviews
  • About this store:
  • Additional Note:
    • Please see the original post for additional details & give the forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff

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16 Comments

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Oct 04, 2025 02:50 PM
348 Posts
Joined Nov 2007
fitbabitsOct 04, 2025 02:50 PM
348 Posts
"Maths."
1
4
Oct 04, 2025 04:24 PM
50 Posts
Joined Nov 2016
EcksterOct 04, 2025 04:24 PM
50 Posts
Quote from fitbabits :
"Maths."
"Maffs."
5
2
Oct 04, 2025 06:03 PM
4,976 Posts
Joined Mar 2013

This comment has been rated as unhelpful by Slickdeals users.

Oct 04, 2025 08:58 PM
43 Posts
Joined Nov 2014
cregavitchOct 04, 2025 08:58 PM
43 Posts

Our community has rated this post as helpful. If you agree, why not thank cregavitch

I read the preview and the 11s trick and square trick seem fun, so it looks practical even if there was a bit of forward and intros to push through. Worth $2
1
1
1
Yesterday 03:34 AM
372 Posts
Joined Nov 2017
lg_20Yesterday 03:34 AM
372 Posts
Just to add, Arthur Benjamin is the author of Mathemagic, it's a 90's infomercial and I'm one of those who bought it. You can watch it on Youtube.
1
Yesterday 03:36 AM
372 Posts
Joined Nov 2017
lg_20Yesterday 03:36 AM
372 Posts
Quote from cregavitch :
I read the preview and the 11s trick and square trick seem fun, so it looks practical even if there was a bit of forward and intros to push through. Worth $2

Yup, the 11's trick has been Arthur Benjamin's quick and powerful trick since his Mathemagic days.
1
Yesterday 07:40 AM
19,275 Posts
Joined Sep 2003
beowulf7Yesterday 07:40 AM
19,275 Posts
Anymore feedback for this book by those above e read it?
1
1

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Global Mod
Yesterday 07:48 AM
15,085 Posts
Joined Dec 2007
SlyderDeals
Global Mod
Yesterday 07:48 AM
15,085 Posts
Quote from lg_20 :
Just to add, Arthur Benjamin is the author of Mathemagic, it's a 90's infomercial and I'm one of those who bought it. You can watch it on Youtube.
Wow, that's a blast from the past. I remember having that book as a kid and doing some of the tricks
1
Yesterday 08:16 AM
2,642 Posts
Joined Dec 2010
slickernsnotYesterday 08:16 AM
2,642 Posts
Quote from beowulf7 :
Anymore feedback for this book by those above e read it?
See above.
1
2
Yesterday 10:56 AM
3,236 Posts
Joined Dec 2015
WB_KYesterday 10:56 AM
3,236 Posts
Love the marketing: "Yes, even you can learn…"

You would still need to see this as a hobby. I felt it was work as every hobby is so for those who have difficulty maybe this can offer answers to some tricks. But if you really sat down I think ppl would have figured these tricks out anyways.

For the joe learn up to your 12x12. That should suffice for practical use. This book does go above that and it can motivate some to work towards a goal. But it's really practice and a practice that needs time. No way around that hard work. This book can justify your discovery and motivate you. Just don't have the delusion it's some secret. There are but I think it's secrets that anybody would have come if they reached above the first stage of memorization. So this is more like an organized journal of one who has properly gone above what is required and the way they evolved.

Any hobby would go through the natural 3 stages of development: memorize rules, break the rules, leave that linearity of rules and creatively experience the "art".

If you need motivation this book can do that. But it's no quick route, while some tricks are explained this is more to the proper approach of advanced practitioners (ie be the number, feel it hear it not just see it). Thats not literally like that but it's the general method of looking beyond the surface. You will need time and devotion to do these.
Last edited by WB_K October 5, 2025 at 04:21 AM.
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Yesterday 01:14 PM
63 Posts
Joined Oct 2018
ScarletDirt565Yesterday 01:14 PM
63 Posts
$2, that's a solid 45% off.
Yesterday 03:24 PM
19 Posts
Joined Feb 2025
CrimsonStar3399Yesterday 03:24 PM
19 Posts
kids don't even learn the multiplication table these days
Yesterday 07:54 PM
204 Posts
Joined Aug 2021
SithLord2021Yesterday 07:54 PM
204 Posts
Quote from fitbabits :
"Maths."
Mathematics shortened to Maths (British English)
Mathematics shortened to Math (American English)
Today 12:06 AM
418 Posts
Joined Jul 2016
aerogemsToday 12:06 AM
418 Posts
Quote from SithLord2021 :
Mathematics shortened to Maths (British English)
Mathematics shortened to Math (American English)
Can't claim to know if it's factually accurate, but it certainly seems plausible. The reason American English seems to drop a lot of the "u"'s and probably the "s" in maths, is because newspaper publishers charged by the character, so dropping "excess" letters was a way to save money and it stuck.

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Today 12:18 AM
418 Posts
Joined Jul 2016
aerogemsToday 12:18 AM
418 Posts
Quote from CrimsonStar3399 :
kids don't even learn the multiplication table these days
To be somewhat fair, I'm assuming you're old enough to have also been told "you won't always have a calculator handy" when you were in school. Well, joke's on the math(s) teachers who said that because pretty much everyone is carrying around the equivalent to a super computer back in those days with them everywhere they go. And let's be honest, it was just pure rote memorization, there was nothing to "learn" about it. At least when I was in school they never really taught the base theory of how multiplication and division work, they just made us memorize the multiplication table up to 10x10.

Given everyone has a phone with them at basically all times these days, you can probably put less emphasis on memorizing the multiplication table. They should still at least know the underlying theory of how multiplication and division work, but in the current global political climate where people celebrate their ignorance and wear it like a badge of honor, and people don't realize that we're only screwing ourselves when we're old and the kids who are taking care of us don't know what the fark they're doing because we didn't want to pay like an extra $5 in taxes every year to support educational institutions.

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