Đề thi violypic môn toán tiếng anh 8 vòng 1 năm học 2017 2018

Vòng 1
Bài 1. Điền
If
and
then
=4
Question 2:If
then
=73
Question 3:If
where k is a constant, and x = 4 when y = 5, then k =20
Question 4:If 10 workers take 8 hours to repair a car then 4 workers will take 20
hours to repair the same car.
Question 5:If
and
then
=2
Question 6:If
and
then
=9
Question 7:If
then the smallest value of is 6
Question 8:
is a square. If
and
then =1

Question 9:If the length of a rectangle is decreased by 25% then the area of this
rectangle will be decreased by 25%
Question 10:If

and
then = 16
Bài 2. Vượt
0

27

81

5
1

16
1

6
7

60
1


70

20
1
0

72
Bài 3. Đỉnh

6
6

1

320
4030
37.5
21

80
706

3
2


1908

15

28
-2

6

12
360
3

2
10
51
10
3


1.14

12

4