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Mathematics
Professional Development
10 Questions

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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. (OBMEP-2012) Marcos tem R$ 4,30 em moedas de 10 e 25 centavos. Dez dessas moedas são de 25 centavos. Quantas moedas de 10 centavos Marcos tem?
16
18
19
20
22
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2. (OBMEP-2012) Renata montou uma sequência de triângulos com palitos de fósforo, seguindo o padrão indicado na figura. Quantos palitos ela vai usar para construir o quinto triângulo da sequência?
36
39
42
45
48
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3. (OBMEP-2013) Ao medir a cintura de Marta com uma fita métrica, Dona Célia observou que as marcas de 23 cm e 77 cm ficaram sobrepostas, como na figura. Qual é a medida da cintura de Marta?
23 cm
50 cm
54 cm
77 cm
100 cm
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4. (OBMEP-2013) Joãozinho subtraiu o menor número de três algarismos diferentes do maior número de três algarismos diferentes. Que resultado ele obteve?
882
883
885
886
888
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5. (OBMEP-2014) Stephani multiplicou 111 por 111 e somou os algarismos do resultado. Qual é o valor dessa soma?
5
6
9
11
12
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6. (OBMEP-2014) Um grupo de 14 amigos comprou 8 pizzas. Eles comeram todas as pizzas, sem sobrar nada. Se cada menino comeu uma pizza inteira e cada menina comeu meia pizza, quantas meninas havia no grupo?
4
6
8
10
12
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7. (OBMEP-2015) Artur deu duas notas de cem reais para pagar uma conta de R$ 126,80. Qual é o valor do troco que ele deve receber?
R$ 71,20
R$ 71,80
R$ 72,20
R$ 72,80
R$ 73,20
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