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Pruebas Nacionales Matemáticas (ES)

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Played 41 %Accuracy 83 Average time 01:42

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Cuestionario de práctica mediana

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Dominican Republic

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Pruebas Nacionales Matemáticas (ES)
 

Pruebas Nacionales Matemáticas (ES)Online version

Cuestionario de práctica mediana

by Lia López
1

Si x + 7 = 15, ¿cuánto vale x?

2

La pendiente de una recta es 3 y pasa por (0,2). ¿Cuál es su ecuación?

3

Si un triángulo tiene ángulos 50° y 60°, ¿cuál es el tercer ángulo?

4

Una esfera tiene radio 5 cm. ¿Cuál es su volumen aproximado? (π≈3.14)

5

La media de 4, 8, 12, 16 es:

6

Si una tienda aplica 20% de descuento a 60, ¿cuál es el precio final?

7

La probabilidad de sacar cara en una moneda justa es:

8

Si 3x = 21, ¿cuánto vale x?

9

El perímetro de un cuadrado de lado 9 es:

10

En una encuesta, 30 de 150 personas prefieren A. ¿Probabilidad de elegir A?

Explicación

Despeja x restando 7 a ambos lados: 15-7 = 8.

Forma y = mx + b con m = 3 y b = 2.

La suma de ángulos internos es 180°, 180-110 = 70.

Volumen: (4/3)πr³ = (4/3)π(125) ≈ 523.6.

(4+8+12+16)/4 = 40/4 = 10.

Descuento = 60×0.20 = 12; 60-12 = 48.

Una moneda tiene dos caras iguales, probabilidad 1/2.

Dividir ambos lados por 3: x = 7.

Perímetro = 4×lado = 4×9 = 36.

Probabilidad = 30/150 = 0.20.

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