I have a bag containing the digits 0 through 9, and used six of them to stick two different three-digit perfect squares on the foreheads of Paul and George. Both Paul and George know this fact, but each one can see only the other's number.

I ask Paul, "How many of the digits remaining in my bag can you exactly tell me?"

Paul replies, "Three."

If I now ask the same question to George, what should he reply?

(In reply to my solution by trgnllyrntsrhc)

hes asking what the numbers are, not how many there are.

Posted by saprom on 2005-12-21 20:58:53