Welcome to the Piano World Piano Forums
Over 2.5 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

SEARCH
Piano Forums & Piano World
What's Hot!!
Hurricane Irma & Our Piano Friends!
--------------------
Posting Pictures on the Forums
-------------------
Forums RULES & HELP
-------------------
ADVERTISE on Piano World
(ad)
Virtual Sheet Music
Download Sheet Music Instantly
Virtual Sheet Music - Classical Sheet Music Downloads
Sheet Music...
(125ad)
Piano Life Saver - Dampp Chaser
Dampp Chaser Piano Life Saver
(ad)
Piano Buyer Guide
Piano Buyer Spring 2017
(ad)
4th Finger Enigma Resolved!
Schumann's 4th Finger Enigma Resolved!
Who's Online Now
86 registered members (Almaviva, ArtlessArt, Beacon Chris, anamnesis, andy250, Andrei Kuznetsov, 20 invisible), 1,811 guests, and 2 spiders.
Key: Admin, Global Mod, Mod
(ad)
Estonia Pianos
Estonia Pianos
Quick Links to Useful Piano & Music Resources
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Live Piano Venues
*Music School Listings
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Directory/Site Map
*Virtual Piano
*Music Word Search
*Piano Videos
*Virtual Piano Chords & Scales
Previous Thread
Next Thread
Print Thread
#920209 - 11/02/08 09:15 PM Can anyone figure this out? Uncanny!  
Joined: Mar 2005
Posts: 2,726
Grandpianoman Offline
2000 Post Club Member
Grandpianoman  Offline
2000 Post Club Member

Joined: Mar 2005
Posts: 2,726
Portland, Oregon

#920210 - 11/02/08 09:28 PM Re: Can anyone figure this out? Uncanny!  
Joined: Dec 2007
Posts: 14,822
keystring Offline
Yikes! 10000 Post Club Member
keystring  Offline
Yikes! 10000 Post Club Member

Joined: Dec 2007
Posts: 14,822
Canada
Ok, this is freaky. eek

#920211 - 11/02/08 09:31 PM Re: Can anyone figure this out? Uncanny!  
Joined: Sep 2008
Posts: 8,453
Horowitzian Offline
8000 Post Club Member
Horowitzian  Offline
8000 Post Club Member

Joined: Sep 2008
Posts: 8,453
eek eek

[Linked Image]


[Linked Image]


Close only counts in horseshoes, hand grenades, and nuclear weapons.
#920212 - 11/02/08 09:32 PM Re: Can anyone figure this out? Uncanny!  
Joined: Aug 2006
Posts: 6,163
sotto voce Offline
6000 Post Club Member
sotto voce  Offline
6000 Post Club Member

Joined: Aug 2006
Posts: 6,163
Briarcliff Manor, NY, USA
It freaked me out, too, especially with that menacing music.

I found out how it works, though I don't think I would have ever figured it out myself.

Steven

#920213 - 11/02/08 11:28 PM Re: Can anyone figure this out? Uncanny!  
Joined: Feb 2007
Posts: 552
Tenuto Offline
500 Post Club Member
Tenuto  Offline
500 Post Club Member

Joined: Feb 2007
Posts: 552
U.S.A.
0,9,18,27,36,45 etc. are all multiples of 9. They all have the same symbols. The answers are always multiples of 9.

They change the symbols for each trial, but they are still the same numbers.

To explain why they always end up with multiples of nine, using algebra:
Let the number for example be 52.
Let x=5
Let y=2
Then the number is 10x + y.
You are asked to add the digits.
That's x+y.
Then substract that from the original number.
That's 10x + y minus x minus y
Result is 9x which is a multiple of 9.
Try any number. The result is always a multiple of 9.

#920214 - 11/03/08 05:54 AM Re: Can anyone figure this out? Uncanny!  
Joined: Aug 2007
Posts: 529
ZPomeroy Offline
500 Post Club Member
ZPomeroy  Offline
500 Post Club Member

Joined: Aug 2007
Posts: 529
australia
so how do they gee the correct symbol then?


"I don't think I handle the notes much differently from other pianists. But the pauses between the notes - ah, there is where the artistry lies" - Artur Schnabel

[Linked Image]
#920215 - 11/03/08 09:04 PM Re: Can anyone figure this out? Uncanny!  
Joined: May 2007
Posts: 6,170
currawong Offline
6000 Post Club Member
currawong  Offline
6000 Post Club Member

Joined: May 2007
Posts: 6,170
Down Under
Quote
Originally posted by zp3929:
so how do they gee the correct symbol then?
In any one trial, your answer will always be a multiple of 9. All multiples of 9 always have the same symbol in any one trial. Therefore, in any trial the gopher just says what that symbol is and he'll be right. In the next trial, the gopher says what the symbol allocated to all multiples of 9 that time is, and he'll be right again, because once again your answer will always be a multiple of 9.


Du holde Kunst...
#920216 - 11/03/08 09:13 PM Re: Can anyone figure this out? Uncanny!  
Joined: Dec 2007
Posts: 14,822
keystring Offline
Yikes! 10000 Post Club Member
keystring  Offline
Yikes! 10000 Post Club Member

Joined: Dec 2007
Posts: 14,822
Canada
Unless you're lousy at math. Then the gopher gets it wrong. wink laugh

#920217 - 11/03/08 10:52 PM Re: Can anyone figure this out? Uncanny!  
Joined: May 2007
Posts: 6,170
currawong Offline
6000 Post Club Member
currawong  Offline
6000 Post Club Member

Joined: May 2007
Posts: 6,170
Down Under
Quote
Originally posted by keystring:
Unless you're lousy at math. Then the gopher gets it wrong. wink laugh
So that's how I managed to fool the gopher! laugh I knew being lousy at maths must have some advantages!


Du holde Kunst...
#1252633 - 08/20/09 01:08 PM Re: Can anyone figure this out? Uncanny! [Re: currawong]  
Joined: Aug 2009
Posts: 16
JustBeingMe Offline
Junior Member
JustBeingMe  Offline
Junior Member

Joined: Aug 2009
Posts: 16
Is there any way to actually not get a multiple of 9??

#1260566 - 09/01/09 07:40 PM Re: Can anyone figure this out? Uncanny! [Re: JustBeingMe]  
Joined: Sep 2008
Posts: 8,453
Horowitzian Offline
8000 Post Club Member
Horowitzian  Offline
8000 Post Club Member

Joined: Sep 2008
Posts: 8,453
Sloppy math. laugh


Close only counts in horseshoes, hand grenades, and nuclear weapons.
#1767580 - 10/09/11 09:51 PM Re: Can anyone figure this out? Uncanny! [Re: Grandpianoman]  
Joined: Oct 2011
Posts: 9
Savex Offline
Junior Member
Savex  Offline
Junior Member

Joined: Oct 2011
Posts: 9
sorry cananot help
I'm not good enough

#1780535 - 10/31/11 02:03 PM Re: Can anyone figure this out? Uncanny! [Re: Grandpianoman]  
Joined: Oct 2007
Posts: 113
Tmoose Offline
Full Member
Tmoose  Offline
Full Member

Joined: Oct 2007
Posts: 113
Washington State
Make up a number, with any number of digits, rearrange the digits (anagram them), subtract one from the other, and the answer will always be a multiple of 9. There are a number of "parlor" tricks that use this phenomenon.

e.g.:

74526984 minus 28465794 = 46061190

Sum the digits in the answer: 4+6+0+6+1+1+9+0 = 27
Sum those digits: 2+7=9

I'll leave the proof to somebody else!


1906 Steinway B (#124401)
#1806955 - 12/16/11 12:32 AM Re: Can anyone figure this out? Uncanny! [Re: Tmoose]  
Joined: Dec 2011
Posts: 5
Kazari Offline
Junior Member
Kazari  Offline
Junior Member

Joined: Dec 2011
Posts: 5
I couldn't resist: Here is an explanation/sketch of proof ( a formal proof would require notation that is more difficult to type out, along with some special cases)

Example: Original number 24971, new number 17249. The difference is 7722 whose sum of digits is 18.

7722 also equals (2-1)*10000+ (4-7)*1000 +(9-2)*100 +(7-4)*10 +(1-9)*1.

The sum of digits = (2-1) +[-1+10-(-(4-7))] + (9-2)+(7-4)+[-1+10-(-(1-9))]
= 2*9 + [(2-1) + (4-7) +(9-2)+(7-4)+(1-9)]
= 2*9 +(2+4+9+7+1) -(1+7+2+4+9)= 2*9 +0

In the first line of the sum of digits expression, the negative expressions in red contributes to the sum of digits in a different way than each positive expression. Essentially that is because to subtract a number from say the thousandth place, you subtact 1 from the ten-thousandth place and then take 10 - your number, the normal way subtraction is done. The next part of a proof relies on the fact that a permutation of the digits of the original number does not change the sum of the digits, that is, the sum of digits in 24971 and 17249 is the same, hence the expression in blue is 0.

Since the difference between the original number and the new number is always a multiple of 9, and that any multiple of 9 always has sum of digits 9, the sum of digits of the difference is always 9.




Working on:

Adagio, Concerto in D minor, movement II (Bach-Marcello)
Nuvole Bianche (Ludovico Einaudi)
Croatian Rhapsody (Tonci Huljic)
Jingle Bell Rock (??)
#1820628 - 01/08/12 02:15 AM Re: Can anyone figure this out? Uncanny! [Re: Grandpianoman]  
Joined: Dec 2011
Posts: 8
mohit80 Offline
Junior Member
mohit80  Offline
Junior Member

Joined: Dec 2011
Posts: 8
Punjab
hey i can't open it. please suggest me how can see it?


Piano Acc. & Gift Items in
Piano World's Online Store
In PianoSupplies.com ,(a division of Piano World)
our online store for piano and music gifts and accessories, Digital Piano Dolly, party goods, tuning equipment, piano moving equipment, benches, lamps Caster Cups and more.


Free Shipping* on Jansen Artist Piano Benches, Cocoweb Piano Lamps, Hidrau Hydraulic Piano Benches
(*free shipping within contiguous U.S. only)
(ad)
Pearl River
Pearl River Pianos
(ad)
Pianoteq
PianoTeq 6 Out now
(ad)
Lindeblad Piano
Lindeblad Piano Restorations and sales
ad
Pierce Piano Atlas


New Topics - Multiple Forums
A question on sheet music
by carolinakeys. 09/22/17 04:10 AM
Garritan CFX vs. Soniccouture Hammersmith
by Osho. 09/21/17 10:48 PM
Chords by Ear?
by tinman1943. 09/21/17 09:14 PM
Kawai MP11 Factory default setup parameters
by HaraldC. 09/21/17 08:36 PM
Hamburg Steinway C-227
by trandinhnamanh. 09/21/17 06:28 PM
Forum Statistics
Forums44
Topics181,971
Posts2,659,356
Members88,878
Most Online15,252
Mar 21st, 2010
(ad)
Accu-Tuner
Sanderson Accu-Tuner
Check It Out!
There's a lot more to Piano World than just the forums.
Click Here to
Explore The Rest of Piano World!!
Visit our online store for gifts for music lovers


 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
| Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter |


copyright 1997 - 2017 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission
Powered by UBB.threads™ PHP Forum Software 7.6.0