I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Monday, October 09, 2006
Seven Ate Nine
Can you replace the missing digits in the number 789,XYZ so that the resulting number is divisibile by 7, 8 and 9? The only restriction being you can't use a 7,8, or 9.