he product of the two-digit number a4 and the three-digit number 3bc is 7656. What is the average of a, b and c? (a, b, c are digits)
Question
he product of the two-digit number a4 and the three-digit number 3bc is 7656. What is the average of a, b and c? (a, b, c are digits)
Solution
Primero, descomponemos los números dados en términos de sus dígitos:
- El número de dos dígitos es .
- El número de tres dígitos es .
La ecuación dada es:
Para encontrar los valores de , y , primero intentamos simplificar la ecuación. Sabemos que debe ser un divisor de 7656. Probamos con diferentes valores de para encontrar un divisor adecuado.
Probamos con :
Dividimos 7656 por 74:
Probamos con :
Dividimos 7656 por 84:
Entonces, y .
Ahora, sabemos que el número de tres dígitos es 91. Descomponemos 91 en términos de y :
Restamos 300 de ambos lados:
Revisamos y encontramos que debe ser 91, lo que significa que y .
Finalmente, tenemos:
Calculamos el promedio de , y :
Por lo tanto, el promedio de , y es 6.
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