Question 8
During the COVID-19 lockdown, three girls were suspected of travelling overseas. An investigator from the Ministry of Health interviewed them.
Raina: “I was at home all day every day.”
Sofia: “I went to the Great Wall of China.”
Tania: “Raina posted an Instagram photo of herself at the airport!”
If one girl was lying, who should be quarantined?
This is a fictional logic puzzle. The source does not specify photo dates, the home country or quarantine rules. Explain any assumptions and whether the conclusion is certain; this response is marked manually.

Raina: “I was at home all day every day.”
Sofia: “I went to the Great Wall of China.”
Tania: “Raina posted an Instagram photo of herself at the airport!”
If one girl was lying, who should be quarantined?
This is a fictional logic puzzle. The source does not specify photo dates, the home country or quarantine rules. Explain any assumptions and whether the conclusion is certain; this response is marked manually.
