In recreational mathematics, rope-burning puzzles are a class of mathematical puzzle in which one is given lengths of rope, fuse cord, or shoelace that each burn for a given amount of time, and matches to set them on fire, and must use them to measure a non-unit amount of time. The fusible numbers are defined as the amounts of time that can be measured in this way. As well as being of recreational interest, these puzzles are sometimes posed at job interviews as a test of candidates' problem-solving ability, and have been suggested as an activity for middle school mathematics students.
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| - Énigme de combustion de mèches (fr)
- Rope-burning puzzle (en)
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| - En mathématiques récréatives, les énigmes de combustion de mèches sont un type de casse-tête mathématique dans lesquels sont données des longueurs de cordes ou de mèches brûlant (de manière non uniforme) pendant un temps donné pris pour unité, et qu'on doit allumer de manière à mesurer une certaine durée. Les nombres fusibles sont les durées que l'on peut mesurer ainsi ; en 2021, une équipe de chercheurs américains a démontré de surprenants résultats d'indécidabilité concernant l'ensemble des nombres fusibles. (fr)
- In recreational mathematics, rope-burning puzzles are a class of mathematical puzzle in which one is given lengths of rope, fuse cord, or shoelace that each burn for a given amount of time, and matches to set them on fire, and must use them to measure a non-unit amount of time. The fusible numbers are defined as the amounts of time that can be measured in this way. As well as being of recreational interest, these puzzles are sometimes posed at job interviews as a test of candidates' problem-solving ability, and have been suggested as an activity for middle school mathematics students. (en)
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| - En mathématiques récréatives, les énigmes de combustion de mèches sont un type de casse-tête mathématique dans lesquels sont données des longueurs de cordes ou de mèches brûlant (de manière non uniforme) pendant un temps donné pris pour unité, et qu'on doit allumer de manière à mesurer une certaine durée. Les nombres fusibles sont les durées que l'on peut mesurer ainsi ; en 2021, une équipe de chercheurs américains a démontré de surprenants résultats d'indécidabilité concernant l'ensemble des nombres fusibles. (fr)
- In recreational mathematics, rope-burning puzzles are a class of mathematical puzzle in which one is given lengths of rope, fuse cord, or shoelace that each burn for a given amount of time, and matches to set them on fire, and must use them to measure a non-unit amount of time. The fusible numbers are defined as the amounts of time that can be measured in this way. As well as being of recreational interest, these puzzles are sometimes posed at job interviews as a test of candidates' problem-solving ability, and have been suggested as an activity for middle school mathematics students. (en)
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