Hi sureshot, nice to see you!
You are in luck - this site
here has lots of save games for Nostradamus, and it is completely safe. Our members have downloaded save games from them many times.
And looking through some Nostradamus walkthroughs, there is some guesswork involved.
Here is from another walkthrough on Gamezebo:
Constance’s dice game
To be able to ask her some questions for your research, she will challenge you to a game.
The goal is to guess what set of 5 dice she threw to get score x.
For instance, if she threw 17 with 5 dice, one of the possible answers is 1+2+3+5+6.
You will have 5 chances to guess one series. If you lose then, you will need to give her something.
Alas there is no real strategy to this game, it’s a bit of guessing. Just make sure you don’t waste any chances by miscalculating.
Some sets I have come across are:
14: 1 + 2 + 3 + 4 + 6
15: 2 + 3 + 3 + 3 + 4
19: 1 + 3 + 4 + 5 + 6
22: 2 + 4 + 5 + 5 + 6
When you win, she will give you Philibert’s medallion, which he asked her to hide for him.