You need to guess the secret code from the clue I give ^^.
When you answer you can post the next problem also (means you post the clue and do not forget the secret code, see if anyone can guess correctly).
If your answer is wrong then the problem-maker will say it is wrong and tell he can tell the answer or keep the answer for other guesses (who knows someone can guess it
).
For example:
CLUE
Hint: Name of an important theorem founder. The picture is related to his greatest theorem which is still very important until now. Who is he?
*Now you must guess who I mean.