de thi olympic tieng anh lop 8 vong 2 nam hoc 2013 2014

de thi olympic tieng anh lop 8 vong 2 nam hoc 2013 2014 tài liệu, giáo án, bài giảng , luận văn, luận án, đồ án, bài tập...

Câu 1 The length of a rectangle is increased by 25%, but the width of the rectangle is

adjusted to keep the area of the rectangle unchanged By what percent was the rectangle’s width adjusted?

A 20 percent B 22 percent C 24 percent D 26 percent

Câu 2 Look at the graph above What is the equation of the line on the graph?

A y = 4 B y = 4x C y = x - 4 D y = x + 4

200x + 150 ≥ 700

Câu 3 There is $150 in Dave’s bank account He deposits $200 into the account each

month Dave needs at least $700 to buy a used car The inequality above can be solved for

x to find the number of deposits Dave must make to reach his goal What is the minimum number of deposits that Dave needs to make in order to buy a used car?

Câu 4 The box-and-whisker plot above shows the amount of time students at East Junior

High School study each week What percent of the students study at least 10 hours each week?

2, 5, 2, 5, 1, 6, 4, 7, 1, 6, 3, 6

Câu 5 The ages of Sasha’s cousins are listed above What is the median age of Sasha’s

cousins?

Câu 6 Carina downloaded songs to her new portable music player each day for five days.

The line graph above shows the total number of songs Carina had on her music player at the end of each day On which day did she add the most songs?

A Tuesday B Wednesday C Thursday D Friday

A 1.5 hours B 2.5 hours C 3.375 hours D 3.625 hours

Câu 8 In the diagram above, the front of the tent forms an isosceles triangle What is the

area of the triangle?

A 24 square feet B 26 square feet C 34 square feet D 48 square feet

Câu 9 A circle is inscribed inside of a square, where the circle touches all four sides of

the square, as shown above Jan wants to calculate the ratio of the area of the square to the area of the circle She knows that the area of the circle = πr2 She determines that the ratio

= 4: π Why is that the case?

A A side of the square = the radius Thus, the area of the square = r2

B A side of the square = 2 times the radius Thus, the area of the square = 4r2

C A side of the square = 4 times the radius Thus, the area of the square = 16r2

D A side of the square =1/2 the radius Thus, the area of the square =1/4r2

Câu 10 In the triangle above, what is the measure of angle R?

Câu 1 Which of the following would transform quadrilateral ABCD to quadrilateral

A′B′C′D′?

A a reflection across the y-axis and a reflection across the x-axis

B a reflection across the y-axis and a slide down 5 units

C a reflection across the x-axis and a slide up 5 units

D a slide down 5 units and a slide right 5 units

Câu 2 Look at the table above Which student group has the least number of members in

8th grade?

A honor society B jazz band C chess club D recycling club

Câu 3 There were 5 women, 14 men, and 21 children on a bus One person signaled the

driver to stop What is the probability that the person who signaled was a woman?

A.1/40 B.1/8 C.1/7 D.1/5

Câu 4 Kari, Myrna, Nate, and Walt were standing in the lunch line How many different

ways could they be arranged in the lunch line?

Câu 5 In the diagram above, lines m and n are parallel Which angles are congruent to

∠1?

A ∠2, ∠3, and ∠8 B ∠5, ∠2, and ∠3

C ∠6, ∠7, and ∠4 D ∠6, ∠3, and ∠8

Câu 6 What is the total number of degrees of the interior angles of this polygon?

Câu 7 The base of a circular pool has a radius of 3 feet What is the approximate area of

the base of the pool? (Use 3.14 for π.)

A 88.74 square feet B 37.78 square feet

C 28.26 square feet D 18.84 square feet

Câu 8 Ian and Lauren are each making patterns that follow the same rule What is the

next number in Lauren’s pattern?

Câu 9 This table above shows the cost of renting a kayak The cost of renting a kayak is

represented by the equation y = 8x + 5, where x represents the number of hours What does the slope of the equation represent?

A The total cost for the rental

B The cost of renting a kayak for 5 hours

C The cost of renting a kayak for 8 hours

D The cost increase for each hour of rental

The oven takes 10 minutes to warm up before the first tray of muffins can be baked

Each tray of muffins takes 20 minutes to bake

Câu 10 Tessa bakes muffins in an oven Which table shows the relationship between the

number of trays of muffins Tessa bakes and the total oven time?

A B.