GFY: Math Challenge #2 - GoFuckYourself.com

kevinale · 05-28-2003, 06:46 PM

I'm not gonna make it a night of brain teasers. This is the last one I post.

Ok. Someone wanted another. So here goes. Pick an integer where four times that number is equal to the original integer whose numbers are reversed.

For example:

      WXYZ * 4 = ZYXW

NOTE: I'm not saying that this integer is 4 digits long. It could be any length.

Good luck.

05-28-2003, 06:56 PM

holy fuck, this could be an all-nighter

Lane · 05-28-2003, 06:56 PM

"0" is one possible answer

was it supposed to be a non-negative non-zero integer?

gezzed · 05-28-2003, 06:57 PM

219978 X 4 = 879912

kevinale · 05-28-2003, 06:57 PM

Quote:

Originally posted by gezzed
219978 X 4 = 879912

Good one!

There are two other answers too that are smaller integers. Can you get them?

05-28-2003, 06:58 PM

Quote:

Originally posted by gezzed
219978 X 4 = 879912

whoa!
show me the script?

Spunky · 05-28-2003, 06:58 PM

none - the hun gets revenue from pre-paid gallery placements on the top 15 spaces and banners. the rest of thegalleries are free placements.

SetTheWorldonFire · 05-28-2003, 06:58 PM

0 through 9

gezzed · 05-28-2003, 07:01 PM

Quote:

Originally posted by SetTheWorldonFire
0 through 9

only 0 works

1 x 4 = 4 which is not 1 reversed
2 x 4 = 8 which is not 2 reversed

etc.

kevinale · 05-28-2003, 07:04 PM

Quote:

Originally posted by gezzed

only 0 works

1 x 4 = 4 which is not 1 reversed
2 x 4 = 8 which is not 2 reversed

etc.

Yes.. 0 works too. There are two more (I forgot 0)..

Give up?

05-28-2003, 07:04 PM

for sure I give up,
I just want to know what kind of script would solve that question =)

gezzed · 05-28-2003, 07:13 PM

I'll post perl source either today or tomorrow. Not that difficult.

kevinale · 05-28-2003, 07:16 PM

Quote:

Originally posted by bdjuf
for sure I give up,
I just want to know what kind of script would solve that question =)

I used PERL.. Here is the script I used. It doesn't have the answers.. I'll post them later..

<pre>

for($i=0; $i<999999; ++$i){
if(checkNum($i)){
print "ANSWER IS $i\n";
#exit(1);
}
}

sub checkNum{
$num = shift;
$num2 = "";
for($j=0; $j<=length($num); ++$j){
$num2 .= substr($num, length($num)-$j, 1);
}
if( ($num*4) hahahaha ($num2*1) ){
return 1;
}
return 0;
}
</pre>

This will print the 4 answers

PS: That "hahaha" is the "= =" without the space

michaelw · 05-28-2003, 07:19 PM

2178
21978
219978

amateurs

michaelw · 05-28-2003, 07:20 PM

One minute VB code:

Code:

Dim zNew As Variant

For x = 1 To 500000
    zNew = x * 4
    If StrReverse(zNew) = x Then
    Debug.Print x
    End If
Next

kevinale · 05-28-2003, 07:20 PM

Quote:

Originally posted by michaelw
2178
21978
219978

amateurs

Those be them.. God job.

Lane · 05-28-2003, 07:23 PM

2178
21978
219978
2199978
21999978
219999978
2199999978
etc..

Lane · 05-28-2003, 07:23 PM

shit, micheal beat me

michaelw · 05-28-2003, 07:29 PM

Quote:

Originally posted by Lane
shit, micheal beat me

05-28-2003, 06:46 PM	#1
kevinale Confirmed User Join Date: Dec 2002 Location: Austin, TX Posts: 2,115	GFY: Math Challenge #2 I'm not gonna make it a night of brain teasers. This is the last one I post. Ok. Someone wanted another. So here goes. Pick an integer where four times that number is equal to the original integer whose numbers are reversed. For example:       WXYZ * 4 = ZYXW NOTE: I'm not saying that this integer is 4 digits long. It could be any length. Good luck. <BR><BR><BR><BR><BR><BR><BR> <BR><BR><BR><BR><BR><BR><BR> <BR><BR><BR><BR><BR><BR><BR> __________________ 1monkey0cup.com

05-28-2003, 06:56 PM	#3
Lane Will code for food... Join Date: Apr 2001 Location: Buckeye, AZ Posts: 8,496	"0" is one possible answer was it supposed to be a non-negative non-zero integer? __________________ Last edited by Lane; 05-28-2003 at 07:03 PM..

05-28-2003, 06:58 PM	#7
Spunky I need a beer Industry Role: Join Date: Jun 2002 Location: ♠ Toiletville ♠ Posts: 133,944	none - the hun gets revenue from pre-paid gallery placements on the top 15 spaces and banners. the rest of thegalleries are free placements. __________________ *YOUR INFORMATION HERE*

05-28-2003, 06:58 PM	#8
SetTheWorldonFire Confirmed User Industry Role: Join Date: Feb 2002 Location: California Posts: 7,444	0 through 9 __________________ www.STWOFDesign.com hit me up on icq 154206276 or Skype: JaimeGizzle

05-28-2003, 07:19 PM	#14
michaelw Confirmed User Join Date: May 2002 Location: Calgary, Canada Posts: 1,342	2178 21978 219978 amateurs __________________ <b><a href="http://www.hotlinkprotector.com"><font color="yellow">Hotlink Protector</font></a> - Protect all your file types from hotlinking the professional way. <br> See a demo <a href="http://www.hotlinkprotector.com/demo.html"><font color="yellow">here</font></a>, and testimonials <a href="http://www.hotlinkprotector.com/testimonials.html"><font color="yellow">here</font></a><br>ICQ: 146423631

05-28-2003, 06:56 PM	#2
buddyjuf Guest Posts: n/a	holy fuck, this could be an all-nighter

05-28-2003, 06:57 PM	#4
gezzed Confirmed User Join Date: Mar 2002 Posts: 317	219978 X 4 = 879912

05-28-2003, 07:04 PM	#11
buddyjuf Guest Posts: n/a	for sure I give up, I just want to know what kind of script would solve that question =)

05-28-2003, 07:13 PM	#12
gezzed Confirmed User Join Date: Mar 2002 Posts: 317	I'll post perl source either today or tomorrow. Not that difficult.

05-28-2003, 07:20 PM	#15
michaelw Confirmed User Join Date: May 2002 Location: Calgary, Canada Posts: 1,342	One minute VB code: Code: Dim zNew As Variant For x = 1 To 500000 zNew = x * 4 If StrReverse(zNew) = x Then Debug.Print x End If Next __________________ <b><a href="http://www.hotlinkprotector.com"><font color="yellow">Hotlink Protector</font></a> - Protect all your file types from hotlinking the professional way. <br> See a demo <a href="http://www.hotlinkprotector.com/demo.html"><font color="yellow">here</font></a>, and testimonials <a href="http://www.hotlinkprotector.com/testimonials.html"><font color="yellow">here</font></a><br>ICQ: 146423631

05-28-2003, 07:23 PM	#17
Lane Will code for food... Join Date: Apr 2001 Location: Buckeye, AZ Posts: 8,496	2178 21978 219978 2199978 21999978 219999978 2199999978 etc.. __________________

05-28-2003, 07:23 PM	#18
Lane Will code for food... Join Date: Apr 2001 Location: Buckeye, AZ Posts: 8,496	shit, micheal beat me __________________