Đề thi Olympic Tiếng Anh lớp 11 vòng 5 năm 2013 - 2014

A weight-lifter adds a certain number of equally weighted plates to the barbell shown above. The weighted plates are identical to one another. If the total mass of the barbell and plates equals 60 kg, and if each side of the barbell has the same number of plates, then one weighted plate could have a mass of

Which equation illustrates the associative property?

What is the length of the line segment that joins the points whose coordinates are (4, 7) and (–3, 5)?

Which expression represents the number of different 8-letter computations. arrangements that can be made from the letters of the word "SAVANNAH" if each letter is used only once?

Marc has a certain number of coins that are dimes d, and quarters, q. Which of the following expressions represents the value of Marc's money in cents?

Ad 1: 0, 0, 1, 2, 3, 4, 4, 6, 7, 11
Ad 2: 0, 1, 2, 3, 3, 4, 5, 8, 10, 10
Ad 3: 2, 2, 3, 4, 4, 5, 6, 7, 8, 11

Javier placed the same three ads in a monthly paper for each of the last 10 months. The monthly number of responses he received to each ad are listed above. Javier used this information to calculate the interquartile range for each ad. Which lists the ads in order from least to greatest interquartile range?

Which graph represents the inverse of h(x) = -3x + 6?

A report showed that 20% of the batteries produced in a factory were faulty. What is the probability that a box of 10 batteries produced in this factory will contain exactly 2 faulty batteries?

In a large neighborhood the values of the homes are normally distributed with a mean of $102.000 and a standard deviation of $17.000.There is a 47.5% probability that the value of a randomly selected home in the neighborhood is greater than $102.000 and less than d dollars. Which is closest to the value of d?