Trouvé sur http://www.artofproblemsolving.com/Alcumus :
Sherlock Holmes and Dr. Watson recover a suitcase with a three-digit combination lock from a mathematician turned criminal. Embedded in the suitcase above the lock is the cryptic message
"AT SEA BASE. SEAS EBB SEA: BASS. "
Dr. Watson comments, "This probably isn't about ocean fish. Perhaps it is an encrypted message. The colon suggests the addition problem SEAS + EBB + SEA = BASS
Traduction pour les anglophobes :
du mot SEA, interprétée comme un nombre décimal."