This trick annoys me!

kiwi_2005 · 03-28-07, 05:17 PM

How does this work any programmers out there, do the choose a double digit number and the rat whateva he is will guess your symbol everytime.

On the third go i chose 66 and im sure he brought up the wrong symbol :hmm:

Probably didn't

http://www.learnenglish.org.uk/games...er-central.swf

kiwi_2005 · 03-28-07, 05:32 PM

Ahh... not my own words im to

-

Was told this: The symbols rotate each time you try it, so the symbol will be different each time. It seems that no matter the number you end up with is dividable by 9.
Count from zero, every ninth number has the same symbol.

STEED · 03-28-07, 05:35 PM

Don't get on the grounds he got all 10 in a row wrong.

Wim Libaers · 03-28-07, 06:33 PM

Quote:

Originally Posted by kiwi_2005

Ahh... not my own words im to

-

Was told this: The symbols rotate each time you try it, so the symbol will be different each time. It seems that no matter the number you end up with is dividable by 9.
Count from zero, every ninth number has the same symbol.

Indeed. Easy to prove. You take some random two-digit number. We can represent that as:
a * 10 + b
where a and b are natural numbers from 0 to 9.

Then, the second number is the sum of those digits:
a + b

Finally, you subtract the second from the first:
(a*10 + b) - (a + b) = a*9

Given that a is a natural number smaller than 10, it's pretty obvious that this has to be a multiple of 9, at most 81.

andy_311 · 03-28-07, 06:58 PM

Ha he got them all wrong.

fatty · 03-28-07, 07:45 PM

You use the result of the subtraction, not your original number. So if you pick 40, you do 40 - (4+0) = 36 and then look 36 up on the symbol list. Lo, 36 is a multiple of 9.

03-28-07, 05:17 PM	#1
kiwi_2005 Eternal Patrol Join Date: May 2004 Location: Aeoteroa Posts: 7,382 Downloads: 223 Uploads: 1	This trick annoys me! How does this work any programmers out there, do the choose a double digit number and the rat whateva he is will guess your symbol everytime. On the third go i chose 66 and im sure he brought up the wrong symbol :hmm: Probably didn't http://www.learnenglish.org.uk/games...er-central.swf __________________ RIP kiwi_2005 Those who can't laugh at themselves leave the job to others.

03-28-07, 05:32 PM	#2
kiwi_2005 Eternal Patrol Join Date: May 2004 Location: Aeoteroa Posts: 7,382 Downloads: 223 Uploads: 1	Ahh... not my own words im to - Was told this: The symbols rotate each time you try it, so the symbol will be different each time. It seems that no matter the number you end up with is dividable by 9. Count from zero, every ninth number has the same symbol. __________________ RIP kiwi_2005 Those who can't laugh at themselves leave the job to others.

03-28-07, 05:35 PM	#3
STEED Lucky Jack Join Date: Jan 2006 Location: Down Town UK Posts: 27,695 Downloads: 89 Uploads: 48	Don't get on the grounds he got all 10 in a row wrong. __________________ Dr Who rest in peace 1963-2017. To borrow Davros saying...I NAME YOU CHIBNALL THE DESTROYER OF DR WHO YOU KILLED IT!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

03-28-07, 06:58 PM	#5
andy_311 The Old Man Join Date: Apr 2005 Location: Oldham, Lancs,England Posts: 1,312 Downloads: 82 Uploads: 0	Ha he got them all wrong.

03-28-07, 07:45 PM	#6
fatty The Old Man Join Date: Jul 2005 Location: Canada Posts: 1,448 Downloads: 10 Uploads: 0	You use the result of the subtraction, not your original number. So if you pick 40, you do 40 - (4+0) = 36 and then look 36 up on the symbol list. Lo, 36 is a multiple of 9.