The scene
Bellavista Workshop · Story machineThe story machine prints a tale in exchange for metal tokens. When the takings are opened, a sealed bag contains six genuine tokens and one lightweight counterfeit hidden among them.
The three suppliers used bags of seven tokens, but different combinations of metals. Before looking inside, the workshop had weighed the bag, then removed exactly two genuine tokens for another check.
What we know for certain
One of these people supplied a bag from their own batch, replacing exactly one token with a one-gram counterfeit. Every bag contained seven tokens. No batches were mixed. Genuine tokens weigh either two or five grams; all the information and measurements are exact.
The three accounts
Aina Miró
Supplier of the light batch«My batch contained five two-gram tokens and two five-gram tokens.»
Pere Bel
Supplier of the dark batch«My batch had three two-gram tokens and four five-gram tokens.»
Sonia Artés
Supplier of the mixed batch«I prepared four two-gram tokens and three five-gram tokens.»
Examine the evidence
0 of 5 openedOpening these five clues does not cost points.
01The first weighing
The bag contained seven tokens, but its complete weight was not recorded. To examine it, two genuine tokens were set aside without touching the counterfeit. The packaging was excluded from every measurement.
02The second weighing
Two genuine tokens were removed, one of each weight: one weighing two grams and one weighing five. The five remaining tokens weighed twelve grams.
03The original contents
Aina prepared five genuine light tokens and two heavy ones; Pere, three light and four heavy; Sonia, four light and three heavy.
04The permitted replacement
The counterfeit weighs one gram. Replacing a genuine two-gram token reduces the total by one gram; replacing a five-gram token reduces it by four. Only one token was replaced.
05The counterfeit check
The counterfeit occupied the bag's only security slot. That slot had originally held a genuine five-gram token; the token removed to make the replacement was not put back in the bag.