Problem #PRU-111328

Problemas Problemas divertidos Problemas de palabras Tablas y torneos Tablas de números y sus propiedades Métodos Principio del casillero Principio del casillero (otros)
 12–14  3.0

Problem

A cinema contains 7 rows each with 10 seats. A group of 50 children went to see the morning screening of a film, and returned for the evening screening. Prove that there will be two children who sat in the same row for both the morning and the evening screening.