Đề thi Olympic Tiếng Anh lớp 9 vòng 16 năm 2013 - 2014

Câu 1

If x > 0, what is 30 percent of 15x?

Câu 2

The percent increase from 8 to 14 is equal to the percent increase from 20 to what number?

Câu 3

Which of the following is equal in value to 1 plus (100 percent of 1)?

Câu 4

A store has 660 books in stock. If 30 percent of these books are on sale, how many books are not on sale?

Câu 5

A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each senior's name is placed in the lottery 3 times; each junior's name, 2 times; and each sophomore's name, 1 time. If a student's name is chosen at random from the names in the lottery, what is the probability that a senior's name will be chosen?

Câu 6

The table above shows the temperatures at noon, in degrees Fahrenheit, in a city in Hawaii over a oneweek period. If m represents the median of these temperatures, f represents the temperature that occurred most often, and a represents the average (arithmetic mean) of these seven temperatures, which of the following is the correct order of m, f, and a?

Câu 7

The projected sales volume of a video game cartridge is given by the function , where s is the number of cartridges sold, in thousands; p is the price per cartridge, in dollars; and a is a constant. If according to the projections, 100,000 cartridges are sold at $10 per cartridge, how many cartridges will be sold at $20 per cartridge?

Câu 8

In the xy-coordinate plane above, line l contains the points (0, 0) and (1, 2). If line m (not shown) contains the point (0, 0) and is perpendicular to l, what is an equation of m?

Câu 9

I. 15
II. 20
III. 22

If two sides of the triangle above have lengths 5 and 6, the perimeter of the triangle could be which of the above?

Câu 10

If x > 1 and , what is the value of m?