Đề thi Olympic Tiếng Anh lớp 9 vòng 4 năm 2013 - 2014

The shadow cast by a one-foot ruler is 8 inches long. At the same time, the shadow cast by a pine tree is 24 feet long. What is the height, in feet, of the pine tree?

Under what circumstances will the product of three numbers always be negative?

Depth of Lake

The depth of a lake is measured at the same location and on the same day every year for a number of years. The table shows the measurements. If the pattern continued, what was the depth of the lake in 2002?

Charlotte scores an average of 10 points per game. On Monday she scored 2 × 10 points. On Tuesday she scored 0.5 × 10 points. How do her points from Monday and Tuesday compare to her average?

Ethan left Homer, Pennsylvania at 10:45 AM. He arrived in Los Angeles, California 5.5 hours later. What time was it when Ethan arrived in Los Angeles?

Marny wants to approximate the amount of wax needed to make a crayon. The dimensions of the crayon are shown above. About how many cubic centimeters of wax are needed to make this crayon?

Jeffrey wants to determine the favorite professional sport of the students in his high school. Which sample should Jeffrey use?

The diameter of the sun is 864,000 miles. How can this value be expressed in scientific notation?

A furniture store has a warehouse for storing furniture. The map shows how the warehouse is divided into separate storage areas for 4 different kinds of furniture. Which 2 storage areas have similar shapes?

Kerry scored a total of 205 points last season by making a total of 120 baskets. Some of the baskets were 1-point free throws (t), and the rest were 2-point field goals (g). Which pair of equations models this situation?