Ivan Shishkin, Rye (1878)

Problems/CombinatoricsUnreviewed

Coefficients effacés dans le triangle de Pascal

by Ancient Tree·
37
Difficulty scaleÉchelle de difficulté

This score reflects both the level of the required concepts and the difficulty of the solution.Ce score tient compte à la fois du niveau des notions nécessaires et de la difficulté de la résolution.

  1. 1–10First steps / middle schoolPremiers pas / collège
  2. 11–25Beginner / high schoolDébutant / lycée
  3. 26–50Intermediate / undergraduateIntermédiaire / licence
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  6. 91–100Research levelNiveau recherche
These levels are approximate guides.Ces niveaux sont des repères approximatifs.
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Chaque nuit nn, le fantôme de Blaise Pascal efface un coefficient aléatoire dans la nn-ième ligne de son triangle.

Pour quelles valeurs de nn est-on certains qu’il effacera un nombre impair ?

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