Quote Originally Posted by lau_kai
This is an utmost annoying question that i assume requires lots of patience(for people like me...)... or just a few secs for mathematicians...

Joe asked Penny to think of four different postive digits and add up the 24 different 4-digit numbers that could be made using the four digits. Then he asked her to subtract just one of the 4-digits numbers from the total and write down the new total. When asked what number she had written down, Penny replied: "122**0".

Joe didnt quite hear the 4th or 5th digits. But he was able to work out the number Penny had subtracted. What was that number?

well, is there any combinations of formluae that may work on this question? or can it be onli pure guess and check?

Thanx in advance

k....look dont ever do this again!!!!!!!!! this is striaght out of new scientist magazine uk.. it the enigma problem july 23rd issue...

with the solution underneath..... you suck if you hand this in with ur entry....if you couldnt do it yourself you should just keep trying till you do, you never learn how to do these problem by reading other peoples, you need the ability to think like that your self. get it by practice and perserverance.

if you came across this problem some other way i'm sorry (but i doubt it).
nxt time at least quote from where you got it from.

i worked it out that way, its not a hard problem, but now its on the web.. oh well.