Đề thi Olympic Tiếng Anh lớp 9 vòng 5 năm 2013 - 2014

Đề thi Olympic Tiếng Anh lớp 9 vòng 5 năm 2013 - 2014
Chọn câu trả lời tốt nhất cho những câu hỏi dưới đây.
1. A diagram is shown. Which angle must be congruent to ∠AGB?

A. ∠DGE

B. ∠EGA

C. ∠AGF

D. ∠CGD

E. None of them

2. The cost of renting a boat is $20 plus $2.50 per hour, where x is the number of hours of
boat rental. Millie wants to spend less than $50 on the boat rental. Which inequality
models this situation?
A. 20x + 2.50 > 50
B. 20x + 2.50 < 50
C. 20 + 2.50x > 50
D. 20 + 2.50x < 50
E. 20 + 2.50x = 50
3. Iodine 131 is a radioactive substance with a half-life of 8 days. With an initial quantity
of 2,400 grams, the chart above shows its decay over a period of days. By extending the
sequence, what is the total amount left after 56 days?

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A. 9.375 grams

B. 18.75 grams

C. 37.5 grams

D. 75 grams

E. 55 grams

4. What is the distance between -4 and 7 on a number line?
A. -11

B. -3

C. 3

D. 11

E. 15

5. A 6-foot man standing next to a flagpole casts an 8-foot shadow. At the same time, the
flagpole casts a shadow of 40 feet. What is the height of the flagpole? (Round to the
nearest whole number.)
A. 30 feet

B. 36 feet

C. 53 feet

D. 64 feet

E. 77 feet

6. Diagonal Lane crosses Maple Court and Oak Street, which are parallel as shown in the
figure above. Which intersection angles must be congruent to ∠A?

A. only ∠C and ∠G

B. ∠C, ∠E, and ∠G

C. only ∠D and ∠H

D. ∠D, ∠E, and ∠H

E. only ∠C
7. Paco’s baseball team traveled from Anchorage, Alaska, to Denver, Colorado, to play in
a tournament. When it is 10:00 AM in Anchorage, it is 12:00 noon in Denver. Paco’s
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baseball game started at 1:00 PM, Denver time, and lasted 3 hours. What time was it in
Anchorage when Paco’s baseball game ended?
A. 10:00 AM

B. 2:00 PM

C. 3:00 PM

D. 4:00 PM

E. 5:00 PM

8. Which 3-dimensional shape can be formed from the net above?
A. cube

B. pyramid

C. prism

D. cylinder

E. None of them

9. Two trapezoid-shaped tabletops are congruent to each other. trapezoid FGHI ≌
trapezoid WXYZ. Which side of trapezoid WXYZ must be congruent to GH ?
A. XY

B. WX

C. YZ

D. WZ

E. None of them

10. A model of a building is in the shape of a cube with a square pyramid on top. Each
edge of the cube is 3 inches, and the square pyramid is 2 inches high with a
3-inch-by-3-inch base. What is the volume of the model in cubic inches?
A. 27

B. 33

C. 45

D. 54

E. 68

Đáp án
Câu 1: A

Câu 6: D

Câu 2: D

Câu 7: B

Câu 3: B

Câu 8: C

Câu 4: D

Câu 9: A

Câu 5: A

Câu 10: B

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