
Desafios Matemáticos do 9º Ano
Mathematics
9th Grade
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual dos seguintes números é irracional?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a probabilidade de sair cara ao lançar uma moeda comum?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolva o sistema de equações: \[ \begin{cases} x + y = 7 \\ x - y = 3 \end{cases} \]
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual dos seguintes números é um número racional?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Em uma urna há 3 bolas vermelhas e 7 bolas azuis. Qual a probabilidade de retirar uma bola vermelha?
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