
PROMEDIOS-RAZONES
Authored by Angel Collazos
Mathematics
11th Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
La razón geométrica de dos números es siete cuartos. Si la razón aritmética es 18; calcula su suma.
42
24
76
66
81
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
18
80
60
42
90
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tres números son como: 3; 4 y 9. Si dichos números suman 256. Hallar la diferencia entre el primero y el tercero.
96
108
72
85
116
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Mario tiene 38 años y Jessica 24 años. ¿Hace cuántos años sus edades fueron como 2 a 1?
12
16
10
18
20
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Se tienen 3 sacos de frejoles de 40kg; 50kg y 60kg, cuyos precios, respectivamente, son: 9; 12 y 18 soles el kilogramo. Si se mezclan, hallar el precio medio.
S/ 11,5
S/ 15,6
S/ 16,5
S/ 15,8
S/ 13,6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Juan Carlos ha obtenido en las cuatro primeras prácticas de aritmética: 11; 13; 10 y 12. ¿Cuál debe ser su nota en la quinta práctica, para que su promedio sea 13?
17
15
18
20
19
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Se tienen 3 tipos de aceites a granel: 25 litros; 15 litros y 60 litros. Sus precios respectivos son: 5 soles; 7 soles y 6 soles el litro. Si se mezclan, ¿cuál será su precio medio?
S/ 6,5
S/ 5,9
S/ 8,4
S/ 4,5
S/ 9,5
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