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Anni [7]
3 years ago
14

Entre 300 et 310, un seul nombre est premier.

Mathematics
1 answer:
Paladinen [302]3 years ago
4 0

Answer:

Step-by-step explanation:

Éliminez les nombres pairs, car ils sont divisibles par 2.

Eliminer 305. Puisque le dernier chiffre est 5, 305 est divisible par 5.

Éliminez 303, 306 et 309. La somme des chiffres de chaque nombre est un multiple de 3, donc le nombre est divisible par 3.

301 et 307 restent.

Il n'y a pas de raccourci pour déterminer si un nombre est divisible par 7, donc testez par division.

301 ÷ 7 = 43, donc 307 doit être le nombre premier.

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3 years ago
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