
Padrõe e regularidades EF.6a9.MAT.42
Authored by Karina Santiago
Mathematics
7th Grade

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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Gustavo was very happy. He had arranged a meeting with a girl he had been trying to win over for a long time. He arrived early at the snack bar where he had arranged the meeting and to contain his anxiety, he started playing with some matchsticks. See below how he arranged them, and observe the table. To form 10 squares, how many matchsticks will be needed?
30 matchsticks
31 matchsticks
32 matchsticks
33 matchsticks
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Observe the following sequence of figures. Each figure is obtained by joining squares of the same size according to the rule suggested by the figures. Let n be the number of the figure in this sequence. Which of the following expressions allows you to calculate the number of squares in this figure?
3n - 1
n² + 1
2n
n²
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the next number? 240, 120, 60, 30, ___
15
20
25
10
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Observe the sequence of figures. Then, answer: how many white squares should the 6th figure in this sequence have?
20
25
30
36
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Na figura abaixo, estão representados os cinco primeiros termos de uma sequência de conjuntos de círculos. Os dois primeiros termos são formados só por círculos pretos. Os restantes são formados por círculos pretos e círculos brancos.
Qual das expressões seguintes pode representar a lei geradora da sequência do número de bolinhas pretas?
2n+1
2n
n2 + 1
2n - 1
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Observe a sequência de figura ao lado.
Qual das expressões seguintes pode representar a lei
geradora da sequência do número de bolinhas (B)?
2n
2n + 1
n2
2n2
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
O Manuel tem um saco com peças de LEGO, todas do tipo 4 por 2, como a da figura ao lado.
Quer construir as muralhas de um castelo e considerou várias possibilidades para a base. A seguir, estão representados três esquemas em que o Manuel pensou e que podem ser considerados os três primeiros termos de uma sequência de “bases” quadrangulares.
Qual é a expressão que permite calcular o número das peças de LEGO necessárias para construir uma “base” quadrangular, tendo em conta o número de cada esquema (1, 2, 3,...,n,...).
4n - 2
4n + 2
6n
6n + 4
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