Question 1
Editorial self-study SET for 2027; not an official SASMO 2027 examination. Known source years remain in individual attributions. Time: 90 minutes. Platform scoring starts at 0: Q1–15 are worth 2 points each; Q16–25 are worth 4 points each; wrong and blank answers score 0; maximum 70. Official SASMO scoring instead starts at 15, deducts 1 for an incorrect Section A answer and has a maximum of 85. Verified means editorially checked; assumptions, source errors and mathematical uncertainty are disclosed where relevant.
A jewel was stolen at an exhibition. Four suspects say:
David: “Ellen stole it.”
Ellen: “Fred did.”
Fred: “I have an alibi.”
George: “Do not believe what Ellen said.”
Exactly one suspect tells the truth. Who is the thief? Enter the name.
Puzzle interpretation: exactly one of the four stole the jewel. Fred’s alibi statement means “I did not steal it”, and George denies Ellen’s statement about this theft.
A jewel was stolen at an exhibition. Four suspects say:
David: “Ellen stole it.”
Ellen: “Fred did.”
Fred: “I have an alibi.”
George: “Do not believe what Ellen said.”
Exactly one suspect tells the truth. Who is the thief? Enter the name.
Puzzle interpretation: exactly one of the four stole the jewel. Fred’s alibi statement means “I did not steal it”, and George denies Ellen’s statement about this theft.