Đề thi giải Toán qua Internet cấp toàn quốc môn Tiếng Anh Khối 4 - Năm học 2014-2015

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