Mời bạn tham khảo đoạn trích trong BST Đề thi Olympic Tiếng Anh lớp 8 vòng 3 năm 2012 của thư viện eLib dưới đây:
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1. Mara has the three spinners shown above. Mara spins each spinner once to make a code consisting of 1 number and 2 letters. Using these spinners, how many different codes are possible?
6x - 7y = 20
–4x + 3y = –20
2. Look at the system of equations above. What is the y-value of the solution to this system?
An artist creates a design by drawing circles in steps, as shown above.
3. The table above on the right shows a pattern of the total number of circles formed at each step. If the pattern shown in the table continues, what will be the total number of circles formed at step 5?
4. Mary started a 12-week weight training program. At the beginning she could lift 15 pounds. The program increased the amount she could lift by 2 pounds per week. Using a linear equation to describe Mary’s weight program, what are the slope and the y-intercept?
A. slope = 2 y-intercept = 15
B. slope = 7.5 y-intercept = 2
C. slope = 12 y-intercept = 30
D. slope = 15 y-intercept = 2
Use the diagrams below to answer the following question.
5. If each block is one cubic unit, what is the volume of the figure?
A. 14 cubic units
B. 16 cubic units
C. 23 cubic units
D. 26 cubic units
6. What number has the above prime factorization?
7. In the diagram above, JL intersects KM at point K. What is the measure of ∠ JKM ?
Consider the real numbers M, N, P, and Q, and the following relationships:
M ＜ N N ＜ P Q ＜ P
8. Which statement is always true?
A. Q - P ＞ Q - N
B. Q - P ＜ N - M
C. Q - N ＞ Q - M
D. Q - N ＜ P - N
9. Jeremy has a box with a rectangular lid. The top of the lid has an area of 392 square centimeters. The ratio of the width to the length of the lid is 1:8. What are the dimensions of the lid?
A. 4 cm by 98 cm
B. 7 cm by 56 cm
C. 8 cm by 49 cm
D. 8 cm by 64 cm
10. At 4:00 P.M. on a sunny day, a stick feet tall casts a shadow 5 feet long. At the same time, a tree nearby casts a shadow 55 feet long. What is the height, in feet, of the tree?
A. 137.5 feet
B. 27.5 feet
C. 22 feet
D. 10 feet
Hy vọng rằng BST Đề thi Olympic Tiếng Anh lớp 8 vòng 3 năm 2012
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