Outline Mathematics
Logic Problems
Robbery #2
Here's a problem to tackle:
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Abdul's shop was robbed once more, but the loot was recovered. Again, there were three suspects; their names were Abu, Ibn, and Hasib. At the trial, they made the following statements:
- Abu: I did not commit the robbery!
- Ibn: Hasib certainly didn't!
- Hasib: Yes, I did!
Later on, two of them confessed to having lied. Who committed the robbery?
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Solution

Copyright © 1996-2009 Alexander Bogomolny
Solution
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Abdul's shop was robbed once more, but the loot was recovered. Again, there were three suspects; their names were Abu, Ibn, and Hasib. At the trial, they made the following statements:
- Abu: I did not commit the robbery!
- Ibn: Hasib certainly didn't!
- Hasib: Yes, I did!
Later on, two of them confessed to having lied. Who committed the robbery?
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(In the applet below, click on the underlined omitted expressions. See what happens.)
Do not forget to check your solution.
References
- R. Smullyan, The Riddle of Scheherazade, Alfred A. Knopf, 1997

Copyright © 1996-2009 Alexander Bogomolny
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