Tuyển tập đề thi toán học sáng tạo cho học sinh lớp 6 - 8 - Tài liệu bằng tiếng anh - Cuộc thi Mathcounts: toán học thật sinh động, gần gũi
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Giới thiệu
Warm-Up 1
| 1...............cm | What is the length, to the nearest centimeter, of the hypotenuse of the right triangle shown?
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| 2...............cm | If the ratio of the length of a rectangle to its width is 9/4 and its length is 18 cm, what is the width of the rectangle? |
| 3...............bins | Mike bought  pounds of rice. He wants to distribute it among bins that each hold 1/3 pound of rice. How many bins can he completely fill? |
| 4...............p.m | It took Jessie 15 minutes to drive to the movie theater from home. He waited 10 minutes for the movie to start, and the movie lasted 1 hour 43 minutes. After the movie ended, Jessie immediately went home. It took Jessie 25 minutes to drive home from the theater. If he left for the movie at 4:05 p.m., at what time did he get home? |
| 5...............$ | A carnival pass costs $15 and is good for 10 rides. This is a savings of $2.50 compared to paying the individual price for 10 rides. What is the individual price of a ride without the pass? |
| 6.................... | If x + y = 7 and x − y = 1, what is the value of the product x∙y? |
| 7.................... | Mrs. Stephens has a bag of candy. The ratio of peppermints to chocolates is 5:3, and the ratio of peppermints to gummies is 3:4. What is the ratio of chocolates to gummies? Express your answer as a common fraction. |
| 8...........degrees | The angles of a triangle form an arithmetic progression, and the smallest angle is 42 degrees. What is the degree measure of the largest angle of the triangle? |
| 9..................... | Each of the books on Farah’s shelves is classified as sci-fi, mystery or historical fiction. The probability that a book randomly selected from her shelves is sci-fi equals 0.55. The probability that a randomly selected book is mystery equals 0.4. What is the probability that a book selected at random from Farah’s shelves is historical fiction? Express you answer as a decimal to the nearest hundredth.
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| 10.................... | According to the graph shown, which of the other eleven months has a number of daylight hours most nearly equal to the number of daylight hours in April?
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