GRADO 9°- OLIMPIADA
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
JUAN ORREGO
Used 6+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Si a=2 ¿Cuál es el valor de la expresión?
6
8
10
16
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Recordar i2 = -1; Al reducir la siguiente expresión compleja 5i + (4i . 2i) - (3i . 7i) + 8i, se obtiene.
-13+13i
-13-13i
13+13i
13-13i
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
¿Cuál es el área de un círculo con un radio de 5 cm?
25 π cm2
15 π cm2
10 π cm2
5 π cm2
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Una caja contiene 3 bolas verdes, 2 rojas y 1 azul. Se desea extraer dos de ellas al azar. La probabilidad de obtener una bola azul es:
1/2
1/4
1/3
1/5
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Se les preguntó a 32 estudiantes de un colegio por el número de horas que dedican a ver televisión diariamente. Los resultados aparecen en la siguiente lista.
0, 2, 4, 2, 2, 2, 2, 3, 3, 4, 0, 2, 4, 2, 2, 4, 0, 4, 2, 2, 4, 2, 2, 3, 3, 2, 2, 2, 2, 4, 4, 0
¿Cuál es la moda de esta lista?
0
2
3
4
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
El área de un triángulo rectángulo con una base de 8m y una altura de 6m es:
12 m2
24 m2
32 m2
48 m2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
El piso de la sala de una casa tiene una superficie de 13,6 m2. Para cubrir el piso de la sala, se van a comprar baldosas que solamente son vendidas en cajas que contienen baldosas suficientes para cubrir 2 m2 de superficie. ¿Cuál es el número mínimo de cajas que se debe comprar?
6
7
13
14
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