
A matemática tem razão
Authored by Marcela GRACIUTI
Mathematics
9th Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um carro percorre 480 km em 6 horas. Qual sua velocidade média?
70 km/h
75 km/h
80 km/h
90 km/h
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Uma cidade tem 300.000 habitantes e 150 km² de área. Sua densidade demográfica é:
150 hab/km²
2000 hab/km²
1500 hab/km²
300 hab/km²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Em uma escala de 1:200.000, 5 cm no mapa representam:
1 km
5 km
10 km
20 km
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a proporção entre 5 : 10 e 15 : x, para que sejam proporcionais?
x = 25
x = 20
x = 30
x = 35
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dividir R$120 entre duas pessoas na razão 1:3. Quanto cada uma recebe?
R$ 30 e R$ 90
R$ 40 e R$ 80
R$ 60 e R$ 60
R$ 20 e R$ 100
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se 6 torneiras enchem um tanque em 4 horas, quantas horas levarão 3 torneiras para enchê-lo?
6 horas
8 horas
10 horas
12 horas
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um pedreiro constrói um muro em 10 dias. Dois pedreiros, trabalhando no mesmo ritmo, terminam em:
3 dias
5 dias
7 dias
20 dias
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