Đề thi Olympic Tiếng Anh lớp 8 vòng 2 năm 2013 - 2014

Câu 1. The length of a rectangle is increased by 25%, but the width of the rectangle is adjusted to keep the area of the rectangle unchanged. By what percent was the rectangle's width adjusted?

 Look at the graph above. What is the equation of the line on the graph?

200x + 150 ≥ 700

There is $150 in Dave's bank account. He deposits $200 into the account each month. Dave needs at least $700 to buy a used car. The inequality above can be solved for x to find the number of deposits Dave must make to reach his goal. What is the minimum number of deposits that Dave needs to make in order to buy a used car?

The box-and-whisker plot above shows the amount of time students at East Junior High School study each week. What percent of the students study at least 10 hours each week?

2, 5, 2, 5, 1, 6, 4, 7, 1, 6, 3, 6

The ages of Sasha's cousins are listed above. What is the median age of Sasha's cousins?

Carina downloaded songs to her new portable music player each day for five days. The line graph above shows the total number of songs Carina had on her music player at the end of each day. On which day did she add the most songs?

A trip between two cities on a standard train takes 4 hours. On a high-speed train, the time for the same trip is reduced by 62.5%. How many hours does the trip on the high-speed train take?

In the diagram above, the front of the tent forms an isosceles triangle. What is the area of the triangle?

A circle is inscribed inside of a square, where the circle touches all four sides of the square, as shown above. Jan wants to calculate the ratio of the area of the square to the area of the circle. She knows that the area of the circle = πr2. She determines that the ratio = 4: π . Why is that the case?

In the triangle above, what is the measure of angle R?