Countdown Calc

horst · Post by **horst** » Tue Apr 14, 2009 11:17 am

Hi,

I'm pretty sure I got the answer. If I compare the first ~20 numbers with my results they match but my answer still seems to be incorrect: 24********24.
Any help would be appreciated

Garfield · Post by **Garfield** » Thu Jul 09, 2009 4:00 pm

I've got exactly the same problem.

EDIT: Solved... nevermind.

jonik555 · Post by **jonik555** » Fri Jun 18, 2010 5:59 pm

Hi, can You give alittle hint? Can this challenge be done just by mind or do I need to use OllyDBG or something like that?
Thank You very much...

smutley · Post by **smutley** » Sat Jun 19, 2010 2:54 pm

There are several ways of solving this, so work out which one is easiest for you. You can work out the sequence of numbers, you can reverse app to see the code, or come up with another one yourself. Like many of the challenges here, there is no one way of solving it.

cheers
smutley

laz0r · Post by **laz0r** » Sat Jun 19, 2010 8:56 pm

I did it by mind and with Wolfram|Alpha (makes many of the challenges much easier!)

ShadowWidow · Post by **ShadowWidow** » Sat Dec 04, 2010 7:47 pm

I am stuck.
I have decompiled the programm an just executed the last run.
The result , maybe the same as horst get, 24**...**24 is wrong.
Can somebady give me a little hint ?

Edit: I've got it.

tripleedged · Post by **tripleedged** » Thu Mar 10, 2011 12:40 am

Hi,
I thought I had the correct formula to get it. But as it turned out, I forgot about a special feature about big numbers. I checked my calculation and noticed that my evaluation of the sequence isnt correct anyway.

It gives me the correct values up to 89 though. So I'm not sure, if stubborn Vista is going wild here?! I don't think that I spoil anything, if I ask if the value for 88 really is 34***76 instead of 33***71, which would perfectly fit in my sequence...

Thanks in advance,
tripleedged

uws8505 · Post by **uws8505** » Thu Mar 10, 2011 6:42 pm

tripleedged wrote:It gives me the correct values up to 89 though. So I'm not sure, if stubborn Vista is going wild here?! I don't think that I spoil anything, if I ask if the value for 88 really is 34***76 instead of 33***71, which would perfectly fit in my sequence...

The sequence has nothing to do with Vista.
Just one more step of thinking, and you're done; the sequence is not so simple, but not so complex either

rmlc14 · Post by **rmlc14** » Sat Jun 04, 2011 9:38 am

hey guys, this challenge is driving me nuts for some days!

i compared the first like 50 numbers printed by the original sharper.exe with my calculation and they all match exactly. why isnt my answer accepted though?

its close to impossible my answer is wrong o.O any clue? thx

EDIT: OMG

the devil is in the details, had to slightly modify formula (even though the 50 first numbers were actually correct). thx anyways.

moose · Post by **moose** » Tue Jul 12, 2011 8:30 pm

Code: Select all

$ wine Sharper.exe 
wine: Install the Windows version of Mono to run .NET executables

Do I have to install Windows for this challenge?

CodeX · Post by **CodeX** » Tue Jul 12, 2011 9:03 pm

it looks like you have to install the windows version of Mono on wine judging by that message

gfoot · Post by **gfoot** » Wed Jul 13, 2011 11:45 pm

Wine is mostly a Win32 API implementation, so you only need it for things that use the Win32 API. Pure CIL assemblies that don't use Win32 APIs can be executed through native Linux mono.

tripleedged · Post by **tripleedged** » Sat Jul 16, 2011 1:13 am

After a deeper look, I managed to solve it by hand... I hoped for more challenges to the north-west, but seems I get stuck there once again, since the crypto was only solved 10 times...

Sat Jul 16, 2011 1:39 am

Wait till you see how many people solved "What in the world"...

CodeX · Post by **CodeX** » Sat Jul 16, 2011 3:00 am

even less people have completed a challenge called "a living dead cat in the box"...