You have to read through this page with its reverse side (by putting it in front of some light).
You can read 234.

You have to pick up the 13th prime number:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41

The answer is 41.

1 = 1
2 = 5
3 = 28
4 = 164

Alors 2 = ?

The answer has been given in line 2 (2 = 5). The answer is "2"

Page 1: if we look carrefuly we can read "Une surprise t'attend en X" which means "a surprise waits for you in X". X refers to the roman figure 10.
Page 2: "concile de cirta" refers to the "Synod of Cirta" which took place in 305 after a research.

Salut Ced, Je fais partie de l'équipe Blue Orange en charge de promouvoir les BDDVELH à travers le monde. Un de nos partenaires m'a posé pas mal de questions sur Sherlock 4 enquêtes, je vais poster pour chaque la traduction en anglais afin de centraliser l'info. Un grand merci pour la réponse aux én...