
Examen de Matemáticas
Authored by Giuliana Peña
Geography
12th Grade

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61 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En una tienda de bicicletas si se vende una haciendo un descuento del 20% del precio de lista, se ganará el 20% del precio de costo. El gerente de ventas quiere saber, ¿qué porcentaje se debe rebajar al precio de lista para ganar el 14% del precio de costo?
28%
70%
21%
24%
76%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calcular el valor de la siguiente operación: E= 60 40 30 20
2
2 20
30 20
120 20
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si: (x+y)2 = x3 + y3. Hallar: xy
1
6
-3
-1
2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En un colegio se sabe que, si “n+1” estudiantes entran en cada una de las “n” aulas, sobrarían 2 estudiantes; pero en cada aula entraran 3 estudiantes más, quedarían 2 aulas vacías. ¿Cuántos estudiantes hay en total?
114
109
112
105
105
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se desea fabricar un recipiente en forma de cilindro recto, cuyo radio sea igual a su altura. Si el costo es S/ 0,05 por cm2 para la parte lateral, S/ 0,07 por cm2 para la base y S/ 0,08 por cm2 para la tapa, halle el costo de fabricar dicho recipiente, si este tiene un volumen de 64π cm3 (considere π = 3,14).
S/ 16,08
S/ 12,56
S/ 10,24
S/ 14,36
S/ 8,14
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En la figura: Determine: cos(A+C)
−1/2
−√2/2
−√3/2
1/2
√3/2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Los obreros A, B, C y D hacen una misma obra por sí solos en 20, 30, 40 y 25 días respectivamente. Empiezan el trabajo los obreros A y B, luego de 3 días se retira B y entra C que trabaja junto con A durante 2 días. Al término de los mismos se retira C e ingresa D y junto con A terminan la obra. ¿Cuántos días tienen que trabajar A y D para terminar la obra?
6
20/3
15/2
17/2
9
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