Prueba diagnóstica - Matemática
Authored by Rodrigo Ramon
Mathematics
10th Grade
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el valor absoluto de -8?
8
-8
0
1
Answer explanation
El valor absoluto representa la distancia de un número respecto al cero en la recta numérica, sin importar su signo. Por eso, |−8| = 8.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál de los siguientes números es un número irracional?
5
Answer explanation
Los números irracionales no se pueden expresar como fracción exacta. π es un número decimal infinito no periódico.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué propiedad se utiliza en la igualdad: 5(x + 2) = 5x + 10?
Conmutativa
Asociativa
Distributiva
Identidad
Answer explanation
La propiedad distributiva permite multiplicar un número por una suma: a(b + c) = ab + ac.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el resultado de (−3)²?
9
6
-6
-9
Answer explanation
(−3)² = (−3) × (−3) = 9. Multiplicar dos negativos da un número positivo.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué tipo de gráfico es más adecuado para representar la distribución porcentual de una encuesta?
Gráfico circular
Diagrama de barras
Diagrama de Venn
Recta numérica
Answer explanation
El gráfico circular representa proporciones o porcentajes dentro de un todo.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resuelve: 2x − 5 = 9. ¿Cuál es el valor de x?
5
6
7
8
Answer explanation
Sumamos 5 a ambos lados: 2x = 14 → Dividimos por 2: x = 7.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la pendiente de la recta que pasa por los puntos (0,2) y (4,6)?
0
1
2
3
Answer explanation
Pendiente m = (y₂ − y₁)/(x₂ − x₁) = (6 − 2)/(4 − 0) = 4/4 = 1.
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