Đề thi giải toán qua Internet cấp toàn quốc môn Tiếng Anh Lớp 4 năm 2015

BỘ GIÁO DỤC VÀ ĐÀO TẠO

ĐỀ THI CHÍNH THỨC

CUỘC THI GIẢI TOÁN QUA INTERNET NĂM 2015

VÒNG THI CẤP TOÀN QUỐC

LỚP 4 TIẾNG ANH

Ngày thi : 10/04/2015

Thời gian làm bài : 60 phút

EXAM 1 : WEB

EASY

1.

4567678934565678

Key : >

2.

18182727 of 2376 is {}

Key : 1584

3.

Find x such that: x+17×12=216

Answer : x = {}

Key : 12

4.

Professor Ngo Bao Chau was born in 1972. He was born in the {}th century.

Key : 20

MEDIUM

5.

How many 4-digit numbers can you make by using only 0 and 1 ?

Answer:There are {} numbers

Key : 8

6.

The area of a rectangle increases by 57 cm2 when each side increases by 3cm. The perimeter of the original rectangle is {}cm

Key : 32

7.

Three oranges are weighted in pairs and 

these weights are 400, 412, and 424 gram.

What is the weight of the lightest orange?

Answer:The weight of the lightest orange is {} gram.

Key : 194

HARD

8.

Peter, Bob and Jack do a work. Peter and Bob working together can complete it 

in 12 hours. Bob and Jack working together can complete it in 10 hours. Jack and 

Peter working together can complete it in 15 hours. Peter needs {}hours to complete this work by himself.

Key : 40

9.

The sum of the digits of all 2-digit numbers is

Key : 855

10.

Some men meet at a conference. Each man shakes hands with each other exactly once. If there are 4950 handshakes in total then the number of men is {}

Key : 100

EXAM 2 : CÓC VÀNG (ĐÁP ÁN A LÀ ĐÁP ÁN ĐÚNG)

EASY

1.

Find the value of 

A=12015+22015+32015++20142015 ?

The value of A is:

A.1007 B.40062015 C.40032015 D.40022015

2.

Which of the following numbers 

can represent the question mark? 

A.48 B.54 C.45 D.36

3.

Which of the following is the number 2, 003, 047 ?

A.Two million , three thousand , 

fourty seven

B.Two million , thirty thousand , 

fourty seven

C.Two million , thirty thousand , 

four seven

D.Two million , three thousand , 

four seven

4.

Which of the following numbers is divisible by 6? 

A.42378 B.25760 C.33332 D.12357

MEDIUM

5.

John uses 13 of his land for growing apples,14 for oranges,

 15 for bananas and the remaining 13 hectares for flowers .

The total area of his land ishectares . 

A.60 B.70 C.50 D.80

6.

Find the value of B=2016×20152015-2015×20162015

Answer:The value of B is:

A.2015 B.2016 C.20152016 D.20162015

7.

The product of 2 natural numbers is 2015 . 

Find the smallest possible sum of these two numbers? 

Answer:The smallest possible sum of these numbers is:

A.96 B.408 C.2016 D.65

HARD

8.

In the equation :N×U×M+B+E+R=33 six letters are 

6 distinct digits from 0 to 9.How many different ways are there 

to choose 6-tuples N,U,M,B,E,R? Answer:There are: 

A.48 ways B.32 ways C.36 ways D.24 ways

9.

Find the missing number x in the following number sequence: 

2 9 18 25 x 57 114 121

Answer:x is:

A.50 B.32 C.34 D.45

10.

One chain with 3 links is 14 cm long. 

Another chain made from 5 links of 

the same type is 22 cm long.How long 

is a chain with 40 such links? 

Answer:A chain with 40 such links is:

A.162cm long B.160cm long C.158cm long D.155cm long

EXAM 3 : ĐUA XE

EASY

1.

The number 4B573 is divisible by 9.The digit B is

Key : 8

2.

Find x such that x×13-415=4115

Answer:x=

Key : 9

3.

Fill in the blank with the correct number

35km+700cm=m

Key : 35007

4.

765-=123×2+276

The correct number filled in the blank is

Key : 243

5.

The area of a rectangle is 30cm2.

If its length is 5cm then its perimeter iscm

Key :22

6.

If x-y=28 then 45×x-60×y+15×x=

Key : 1680

MEDIUM

1.

Jane shoots two arrows. In the drawing we see that her score is 5.

If both arrows hit target then she can getdifferent values of her score.

Key : 7

2.

How many triangles 

in the following figure ?

Answer:There aretriangles .

Key : 15

3.

Find the value of digit x if 2006<20x5<2041 

and 20x5 is divisible by 3 ?

Answer:The value of x is

Key : 2

4.

The average of five consecutive numbers is 100 .

The average of three greatest numbers is

Key : 101

5.

There are 30 students in a class. 16 students have rulers; 

12 students have erasers and 8 students have nothing. 

How many students have both ?

Answer:There arestudents

Key : 6

6.

In the following figure, there are two squares and four identical 

rectanggles.The perimeter of each rectangle is 60cm.The perimeter 

of the bigger square iscm

Key : 120

HARD

1.

Find the greatest natural number m such that: 1217<85+m<2123

Answer:m=

Key : 6

2.

The following figure shows 

three operations .Find X

Answer:X=

Key : 3

3.

One month has five Tuesdays.The first and 

the last day are not Tuesday.

The last Sunday of this month isth 

Key : 28