
CRCS Mathlympics - 7MO
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Mathematics
7th Grade
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12 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Una bolsa de papel contiene 22 bolas iguales, excepto que dos de ellas son rojas, tres azules, diez blancas, cuatro verdes y tres negras. Las bolas son extraídas de la bolsa al azar y sin devolverlas. La cantidad mínima de bolas que deben extraerse para obtener dos del mismo color es
4
5
6
9
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
La suma de los dígitos del mayor divisor del número n = 1 223 334 444, distinto de n, es
32
33
34
35
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
En el siguiente tablero 4 × 4 se escribió en cada casilla una operación, de manera que en cada fila y en cada columna los resultados contienen cada número del 1 al 4. Sin embargo, se borraron algunas casillas; la operación que podría estar en la esquina inferior derecha es
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Si seis trabajadores construyen un muro en 10 días, con una jornada de ocho horas diarias, entonces la cantidad de trabajadores que se necesita para construir un muro igual al anterior, pero en cinco días con jornadas de cuatro horas diarias, corresponde a
6
12
24
32
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hoy es sábado y Ricardo inicia la lectura de un libro de 200 páginas. Ricardo solo puede leer seis páginas cada día, excepto los sábados que puede leer 25 páginas. La cantidad mínima de días que le tomará a Ricardo leer el libro completamente es
22
23
24
25
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