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There are 5 bells which toll together at 10:00 A.M. They toll after 8,9,10,11,12 seconds respectively. How many times will they toll together again in the next 4 hours?34567

Question

There are 5 bells which toll together at 10:00 A.M. They toll after 8,9,10,11,12 seconds respectively. How many times will they toll together again in the next 4 hours?34567

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Solution

Para resolver este problema, necesitamos encontrar el mínimo común múltiplo (MCM) de los intervalos de tiempo en los que las campanas suenan: 8, 9, 10, 11 y 12 segundos. Luego, determinaremos cuántas veces este MCM cabe en el período de 4 horas.

  1. Encontrar el MCM de 8, 9, 10, 11 y 12:

    • Descomponemos cada número en sus factores primos:

      • 8 = 2^3
      • 9 = 3^2
      • 10 = 2 * 5
      • 11 = 11 (es un número primo)
      • 12 = 2^2 * 3
    • Tomamos el mayor exponente de cada factor primo:

      • 2^3 (de 8)
      • 3^2 (de 9)
      • 5 (de 10)
      • 11 (de 11)
    • Multiplicamos estos factores:

      • MCM = 2^3 * 3^2 * 5 * 11
      • MCM = 8 * 9 * 5 * 11
      • MCM = 72 * 5 * 11
      • MCM = 360 * 11
      • MCM = 3960 segundos
  2. Convertir 4 horas a segundos:

    • 4 horas = 4 * 60 minutos = 240 minutos
    • 240 minutos = 240 * 60 segundos = 14400 segundos
  3. Determinar cuántas veces el MCM cabe en 14400 segundos:

    • Dividimos el total de segundos por el MCM:

      • 14400 / 3960 ≈ 3.636
    • Como estamos buscando el número de veces que las campanas suenan juntas, tomamos la parte entera de la división:

      • Las campanas sonarán juntas 3 veces en las próximas 4 horas.

Por lo tanto, las campanas volverán a sonar juntas 3 veces en las próximas 4 horas.

This problem has been solved

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