**1** Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 5/11/2015, 3:37 pm

**2** Re: Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 19/12/2015, 3:23 pm

**3** Re: Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 20/1/2016, 10:14 pm

Các bạn có thể tải toàn bộĐề và đáp án vòng 7 thi Toán tiếng Anh (Math ViOlympic) lớp 5 năm học 2015 - 2016tạiđây.

**Exam 1: Sắp xếp**

2.4:2=1.2 | 4.5:3=1.5 | 3.6:2=1.8 | 0.4x5=2 |

8.4:4=2.1 | 6.45:3=2.15 | 0.9x2.5=2.25 | 4.9x0.5=2.45 |

0.5x5=2.5 | 10.12:4=2.53 | 7:5+1.6=3 | 25:8=3.125 |

0.7+15:6=3.2 | 11:4+0.5=3.25 | 255:25:3=3.4 | 6.92x4:8=3.46 |

41:4-6.73=3.52 | 1.78:2x4=3.56 | 12:5+1.25=3.65 | 3:4x5=3.75 |

9.03:2.15=4.2 | 13.43:3.16=4.25 | 5.22:1.2=4.35 | 10.95:2.5=4.38 |

22.65:5=4.53 | x, if 5% of x is 0.23=4.6 | x, if 40% of x is 1.86=4.65 | 20% of 23.5=4.7 |

25% of 19.2=4.8 | 15% of 33=4.95 |

**Exam 2: Cóc vàng tài ba**

191 is a number that stays the same when read backwards as when read forwards. How many 4 - digit numbers have this property?

**Answer: 90**

A rectangle has a perimeter of 3.6dm and one side is twice as long as another. What is the rectangle’s area in m

^{2}?

**Answer: 0.0072**

A rectangle is divided exactly 12 identical squares arranged in four rows. What is the area of the rectangle, if the perimeter of one small square is 15cm? Answer:

**168.75cm**

^{2}**Answer: Black**

Calculate: 0.18 x 400 = …

**Answer: 72**

Calculate: 6.3 x 6.4 + 3.6 x 6.3 = …

**Answer: 63**

Calculate: 376. 82 + 295.69 = …

**Answer: 672.51**

Charlie buys two pairs of shoes for $15.75 each. He gives the clerk $50.00. How much change should Charlie receive?

**Answer: $18.5**

Find the standard decimal form of 5 x 0.01 + 3 x 0.2.

**Answer: 0.65**

Find the value of

*x*such that 9.6 x

*x*=6.4 x 7.2.

**Answer: 4.8**

Find the value of

*x*such that

*x*x 3.6 =18.72.

**Answer: 5.2**

Find two numbers if their sum is 8.15 and their difference is 3.09.

**Answer: 5.62 and 2.53**

**Answer: Jacob**

If 15.498 < 15.4

*xy*then

*y*= …

**Answer: 9**

If

*x*is a natural number and

*x*< 17.988.

**Answer: 17**

If

*x*x 3.7 = 17.76 then 7.4 x

*x*= …

**Answer: 35.52**

If you can ride 7.35km in a 15 minutes then how far can you ride in 2 hours?

**Answer: 58.8km**

In one month, there are five Fridays. This month could not have …

**Answer: five Tuesdays**

**Answer: Chọn đáp án B (có 03 hình tam giác trên tổng số 12 hình)**

**Answer: 5**

James buys 5 Harry Potter books at $200.25 each. What is the total cost?

**Answer: $1001.25**

James is 8 years old. His mother Mary is 4 times as old as him. How old will James be when Mary is twice as old as him?

**Answer: 24 years old**

Mary calculates the sum of the digits that she sees on her clock (example: If the clock shows 16:35 then she gets 15). What is the biggest sum she can get if the clock is a 24 - hour clock?.

**Answer: 24?**

**Answer: 1**

The perimeter of a rectangular land is 96.26m. Its length is 26.05m. Its area is …m

^{2}.

**Answer: 575.184**

**Answer: $13.75**

The value of 2.56 x 4.15 + 7.623 is…

**Answer: 18.247**

The value of the digit 5 in 238.159 is…

**Answer: 0.05**

The value of the digit 2 in 732.68 is…

**Answer: 2**

**Answer: 8.25**

**Exam 3: Đỉnh núi trí tuệ**

…% of 120 is 138.

**Answer: 115**

…% of 256 is 64.

**Answer: 25**

60% of Jane’s school are girls and there are 180 more girls than boy. How many students are there in Jane’s school?

**Answer: 900**

Anna add 4g of sugar to 16g of water. What is percentage of sugar in the solution obtained?

**Answer: 20**

Anna buys a dress at a discount of 25%. She spents of her money to buy the dress and has $450 left. How much does the dress cost before the discount?

**Answer: 225**

At a supermarket, a certain item has increased from 75 cents per pound to 87 cents per pound. What is the percentage increase in the cost of the item?

**Answer: 16**

Calculate the percentage: 35% of 0 is … (Write your answer by natural number or decimal in the simlest form).

**Answer: 0**

Calculate the percentage: 70% of 48 is … (Write your answer by natural number or decimal in the simlest form).

**Answer: 33.6**

Find the following percentage: 30% of 22 is … (Write your answer by natural number or decimal in the simlest form).

**Answer: 6.6**

Find the following percentage: 75% of 75 is … (Write your answer by natural number or decimal in the simlest form).

**Answer: 56.25**

Find the following percentage: 80% of 450 is … (Write your answer by natural number or decimal in the simlest form).

**Answer: 360**

Find the value of

*x*if 75% of

*x*is 465.

**Answer: 620**

Find the value of

*x*such that: 6.5:

*x*= 6.5 x

*x*.

**Answer: 1**

Find the value of

*y*such that: 1.1 x 1.2 x 1.3 x

*y*=

*y*x 2.1 x 2.2 x 2.3.

**Answer: 0**

How many pairs of two - digit natural numbers have a difference equal to 40?

**Answer: 50**

In a town, 45% are adults. How many children are there in the town if there are 675 adults?

**Answer: 825**

The incorrect calculation: 2 x 3 + 6 x 4 = 42 may be made correct bay increasing one of these number by 2. Which number should it be?

**Answer: 4**

The number 42 has the property that it is divisible by the digit in the ones place, bacause 42 is divisible by 2. How many numbers between 20 and 40 have this property?

**Answer: 9**

The original price of an umbrella is $15. What is its price after two times 10% dicount?

**Answer: 12.15**

There are 40 students in Mrs. Jane’s class. 20% of her students receive a B on the test. How many students do not receive B?

**Answer: 32**

**4** Re: Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 7/3/2016, 7:38 pm

Các bạn có thể tải toàn bộĐề và đáp án vòng 8 thi Toán tiếng Anh (Math ViOlympic) lớp 5 năm học 2015 - 2016tạiđây.

**Exam 1: Đi tìm kho báu**

A clothing shop is having a 40% off sale. How much would Jane have to pay for a $30 sweater with a discount?

**Answer: $18**

A motorbike at Store A costs $900. The regular price of the same motorbike at Store B is 10% more than it is at Store A. The motorbike is on sale at Store B for 10% off of the regular price. What is the sale price of the motorbike motorbike at Store B?

**Answer: $891**

Anna, Bella, Charlie, Daniel, and Elly are sitting in the 5 chairs around a circular table. Charlie and Elly are sitting beside each other. Anna and Daniel are not sitting beside each other. The 2 people who are seated on either side of Bella are…

**Answer: Anna and Daniel**

**Answer: 6**

**Answer: 11**

If a pen costs $1.75 and an eraser costs $0.85, which of the following is the cost of 10 erasers and 5 pens? Answer:

**$17.25**

**Answer: 19/4**

**Answer: 50**

**Answer: 144**

**Answer: 0.85**

The average of five consecutive even numbers is 40. The average of the smallest and largest of these number is ...

**Answer: 40**

The price of a pair of shoes after one 10% sale is $22.5. The original price of the shoes is $...

**Answer: 25**

There are 40 students in Mrs. Brown’class. 25% of her students received a B on the test. How many students received a B?

**Answer: 10**

What is the product of 3.05 and 2.8?

**Answer: 8.54**

Which decimal is equal to 9/16?

**Answer: 0.5625**

Write 45% as a fraction. The result is…

**Answer: 9/20**

**Exam 2: Tìm cặp bằng nhau**

**Exam 3: Fill in the blank with the suitable number**

Question 7:

A bag contains green marbles and red marbles only. If the ratio of the number of green marbles to the number of red marbles is 1:4 then

**20**% of marbles are green.

Question 8:

Alice is going to the store. One third of the way to the store, she stops to talk with Kelly. She then continues for 6 km and reaches the store. How many kilometres does she travel?

Answer:

**9**km.

Question 3:

At the beginning of the summer, Bob was 140 cm tall. At the end of the summer, he measured his height again and discovered that it had increased by 5%. Measured in cm, what was his height at the end of summer?

Answer:

**147**cm.

Question 1:

Bella scores on six of her eight pictures. The percentage of pictures that she does not score on is

**25**%.

Question 9:

How many different 3-digit whole numbers can be formed using the digits 4, 5, 0 and 8, assuming that no digit can be repeated in a number?

Answer: There are

**18**numbers.

Question 6:

How many even numbers between 1 and 100 are divisible by 5?

Answer: There are

**9**numbers.

Question 5:

How many three-digit numbers are exactly 19 more than a two-digit number?

Answer:

**19**numbers.

Question 10:

In the 3×3 table shown, the numbers 2, 4 and 6 are placed so that each number occurs only once in each row and only once in each column. The value of M+N is

**6**

Question 4:

The length of each edge of a cube is 3 cm. The surface area of the cube, in cm

^{2}, is

**54**

Question 6:

The area of the figure shown is

**16**

(All the sides are measured in the same units)

Question 2:

The number of centimetres in 7.05 metres is

**705**

**5** Re: Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 20/3/2016, 10:22 am

Các bạn có thể tải toàn bộĐề và đáp án vòng 9 (vòng tỉnh) thi Toán tiếng Anh (Math ViOlympic) lớp 5 năm học 2015 - 2016tạiđây.

**Exam 1: Vượt chướng ngại vật**

1.83 + … = 2. The missing number is …

**Answer: 0.17**

16 is what percent of 80?

**Answer: 20**

A cube has a volume of 64cm

^{3}. The area of one face of the cube is …cm

^{2}.

**Answer: 16**

After running 20% of a race, Bob had run 25m. How long was the race, in metres?

**Answer: 125**

Alice are going to buy sugar for her cooking class. She need to have kg of sugar for every students in her class. There are 18 students in her class. How many kilogram of sugar should Alice buy?

**Answer: 3**

Alice’s mathematics exam had 30 algebra questions and 50 geometry questions, each worth 1 mark. She got 70% of the algebra questions correct, and 60% of her questions correct. How many geometry questions did she answer correctly?

**Answer: 27**

Find x such that x : 4 = 0.626.

**Answer: 2.5**

Jack need to earn enough money to buy a new skateboard that costs $48.45. He has $15.34? How much money does he need to buy the skateboard?

**Answer: 33.11**

**Lucy has played 20 games and has a 95% winning percentage. Without losing any more games, how many more games must he win to reach exactly a 96% winning percentage? Answer: 5**

The distance from Anna’s house to the store is 1/2 mile. Anna run to the store twice a day, 7 days a week for 3 weeks. How many miles does she run in total?

**Answer: 21**

What is the quotien of 0.51 and 17?

**Answer: 0.03**

**Exam 2: Fill in the blank with the suitable number**

Question 1:

Jack rides his horse with a constant speed of 12 miles per hour. How far can he travel in 1 1/2 hours?

Answer:

**18**miles.

Question 2:

Bob roller skates with a constant speed of 14 miles per hour. How far can he travel in 1/2 hour?

Answer:

**7**miles.

Question 3:

Emily rides her bike with a constant speed of 12km/h. How far can she travel in 3 hours?

Answer:

**36**km.

Question 4:

An airplane flies with a constant speed of 810 miles per hour. How far can it travel in 4 1/2 hours?

Answer:

**3645**miles.

Question 5:

John drove from Town A to Town B in 5 hours. His average speed for the first 3.5 hours was 64km/h. His average speed for the last 1.5 hours was 60km/h. What was the total distance he traveled?

Answer:

**314**km.

- Bài giải chi tiết:
- Quãng đường John lái xe được trong 3.5 giờ đầu là 64 x 3.5 = 224 (km)

Quãng đường John lái xe được trong 1.5 giờ cuối là 60 x 1.5 = 90 (km)

Tổng quãng đường John lái xe được trong suốt chuyến đi là 224 + 90 = 314 (km)

Question 6:

A car traveled at 50km/h for 2 hours and at 60km/h for 3 hours. What is the car’s average speed?

Answer:

**56**km/h

Question 7:

Bob drove from City P to City Q. He traveled the first 36km at an average speed of 54km/h. He traveled the remaining 96km at a average speed of 72km/h. Find his average speed for the whole trip.

Answer:

**66**km/h.

- Bài giải chi tiết:
- Thời gian Bob lái xe cho 36km đầu tiên là 36 : 54 = 2/3 h

Thời gian Bob lái xe cho 96km còn lại là 96 : 72 = 4/3 h

Tổng thời gian Bob lái xe từ thành phố P tới thành phố Q là 2/3 + 4/3 = 2 h

Tốc độ trung bình của Bob khi lái xe từ thành phố P tới thành phố Q là (36 + 96) : 2 = 66 km/h

Question 8:

The distance between John’s home and the park is 3000m. John walked from his home to the park at a speed of 100m per minute and then walked back home at a speed of 150m per minute. What is the John’s average speed in meter per minute?

Answer:

**120**meter per minute.

Question 9:

A train crosses a tree in 10 second and a bridge 225m long in 25 second. Find the length of the train.

Answer:

**150**m.

- Bài giải chi tiết:
- Thời gian cả chiếc xe lửa vượt qua chiều dài của chính nó là 10 (giây)

Thời gian cả chiếc xe lửa vượt qua chiều dài của cây cầu dài 225m và chiều dài của chính nó là 25 (giây)

Thời gian để điểm đầu của xe lửa vượt qua chiều dài của cây cầu là 25 - 10 = 15 (giây)

Số mét chiếc xe lửa chạy được trong thời gian 1 giây là 225 : 15 = 15 (m)

Chiều dài của xe lửa là 15 x 10 = 150 (m)

Question 10:

Peter and Jacob were running. Both of them run with their constant speeds. They started at the same time and the same place. When Jacob reached the finishing line, Peter had only run 5/8 of what Jacob had run. Jacob’s speed is 75m/min (metre per minute) faster than Peter. What was Peter’s speed in m/min?

Answer:

**125**m/min.

- Bài giải chi tiết:
- Gọi a là vận tốc chạy của Peter thì vận tốc chạy của Jacob là a + 75

Theo bài ra, ta có a = (a + 75) x 5/8

Hay 8a = 5a + 75x5

Giải ra, ta được a = 125 (m/min)

**Exam 3: Cóc vàng tài ba**

A box contains 21 disks, each coloured red, blue and green. There are twice as many green disks as red disks, and half as many blue as red. How many disks are red?

**Answer: 6**

Charlie and Lily go on a 24 km run. They both usually run at 9 km/h. If Charlie runs at 2/3 his usual running speed, and Lily runs at 4/3 times her usual speed, how many more hours does it take Charlie to complete the run than it takes Lily to complete the run?

**Answer: 2**

Each face of a cube is painted with exactly one colour. What is the smallest number of colours needed to paint a cube so that no two faces that share an edge are the same colour?

**Answer: 3**

If the numbers: 2/5; 41% and 0,401 are arranged from largest to smallest, the correct order is ...

**Answer: 41%; 0,401; 2/5**

In the diagram, the percentage of small squares that are shaded is …

**Answer: 36%**

Susan wants to divide 35,5 kg sugar in small bags. If each bag holds 0,5kg, how many bags are needed?

**Answer: 71**

The number of centimetres in 2,5 metres is …

**Answer: 250**

The results of a survey of the hair colour of 500 people are shown in this circle graph. How many people have blonde hair?

**Answer: 150**

You walk 2 miles with your dog in only 40 minutes. Your average speed is ...

**Answer: 0,05 mile in per minute**

**6** Re: Đề và đáp án thi Toán tiếng Anh (Math ViOlympic) lớp 5 NH 2015 - 2016 on 19/4/2016, 8:28 pm

Các bạn có thể tải toàn bộĐề và đáp án vòng 10 thi Toán tiếng Anh (Math ViOlympic) lớp 5 năm học 2015 - 2016tạiđây.

**Exam 1: Fill in the blank with the suitable number**

Question 2:

0.6 hour =

**36**minutes.

Question 3:

5 minutes 27 seconds: 3 =

**109**seconds.

Question 4:

12 hours 24 minutes x 2 =

**24.8**hours.

(Write your answer by decimal in the simplest form)

Question 1:

51 hours =

**2.125**days

(Write your answer by decimal in the simplest form)

Question 7:

How far will Mary travel if she rides her motorbike for 24 minutes at a speed of 75 miles/hour?

Answer: 30 miles.

Question 8:

How fast is Anna going if she runs 8 miles in the park in only 2 hours?

Answer:

**4**mile/hour.

Question 6:

How fast is Jack going if the train he is on travels 20 miles in just 6 minutes?

Answer:

**200**miles/hour.

Question 9:

The area of a rectangle ABCD is 56 cm

^{2}. Given a random point E inside of ABCD.Find the total area of triangles AED and BEC.

Answer:

**28**cm

^{2}.

Question 10:

The distance between 2 trees is 300 meters. It will take a bird 30 seconds to fly between these 2 trees. How fast is the bird in kilometer per hour?

Answer:

**36**km/h.

Question 5:

Yesterday Peter roller skated for 2.5 hours at a speed of 6 km/h. How many kilometers did he skate?

Answer:

**15**km.

**Exam 2: Cóc vàng tài ba**

Find the value of

*x*such that

*x*+ 3/7 = 26/21.

**Answer: 17/21**

Calculate: 23.61 x 4.23 = …

**Answer: 99.8703**

Which of following is correct?

**Answer: 100 + 64 = 104 + 60**

In a school library, there are 101000 English books, 92683 Math books and 216094 books of other subjects. How many books are there in the library?

**Answer: 409777 books**

Jack buys 25 sofas from a wholesale market for $3750, and then he sells all of them at a loss of 4%. How much money did he sell each sofa for?

**Answer: $144**

What is the difference between the sum of the first 2016 even natural numbers, and the first 2016 odd natural numbers?

**Answer: 2016**

**Exam 3: Sắp xếp**

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