Đề thi Violympic môn Tiếng anh lớp 5 vòng 7 - Năm học 2015-2016

Exam 1: Sắp xếp
2.4:2=
4.5:3=
3.6:2=
0.4x5=
8.4:4=
6.45:3=
0.9x2.5=
4.9x0.5=
0.5x5=
10.12:4=
7:5+1.6=
25:8=
0.7+15:6=
11:4+0.5=
255:25:3=
6.92x4:8=
41:4-6.73=
1.78:2x4=
12:5+1.25=
3:4x5=
9.03:2.15=
13.43:3.16=
5.22:1.2=
10.95:2.5=
22.65:5=
x, if 5% of x is 0.23=
x, if 40% of x is 1.86=
20% of 23.5=
25% of 19.2=
15% of 33=
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? 
A rectangle has a perimeter of 3.6dm and one side is twice as long as another. What is the rectangle’s area in m2? 
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? 
Calculate: 
0.18 x 400 =  
6.3 x 6.4 + 3.6 x 6.3 =  
376. 82 + 295.69 =  
Charlie buys two pairs of shoes for $15.75 each. He gives the clerk $50.00. How much change should Charlie receive? 
Find the standard decimal form of 5 x 0.01 + 3 x 0.2. 
Find the value of x such that 9.6 x x =6.4 x 7.2
Find the value of x such that x x 3.6 =18.72. 
Find two numbers if their sum is 8.15 and their difference is 3.09. 
Four friends eating four pizzas that have same size. John has left, James has left, Jacob has left and Billy has left. who eats the most amount of pizzas? 
If then y =  
If x is a natural number and x < 17.988. 
If x x 3.7 = 17.76 then 7.4 x x =  
If you can ride 7.35km in a 15 minutes then how far can you ride in 2 hours? 
In one month, there are five Fridays. This month could not have  
James buys 5 Harry Potter books at $200.25 each. What is the total cost? 
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? 
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?. 
The perimeter of a rectangular land is 96.26m. Its length is 26.05m. Its area is m2. 
The value of 2.56 x 4.15 + 7.623 is 
The value of the digit 5 in 238.159 is 
The value of the digit 2 in 732.68 is 
Write as a decimal number. ..
Exam 3: Đỉnh núi trí tuệ
% of 120 is 138. ..
% of 256 is 64. .
60% of Jane’s school are girls and there are 180 more girls than boy. How many students are there in Jane’s school? 
Anna add 4g of sugar to 16g of water. What is percentage of sugar in the solution obtained? 
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? 
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? 
Calculate the percentage: 35% of 0 is  (Write your answer by natural number or decimal in the simlest form). .
Calculate the percentage: 70% of 48 is  (Write your answer by natural number or decimal in the simlest form). .
 .
 .
Find the following percentage: 30% of 22 is  (Write your answer by natural number or decimal in the simlest form). .
Find the following percentage: 75% of 75 is  (Write your answer by natural number or decimal in the simlest form). .
Find the following percentage: 80% of 450 is  (Write your answer by natural number or decimal in the simlest form)..
Find the value of x if 75% of x is 465
Find the value of x such that: 6.5: x = 6.5 x x..
Find the value of x such that: . 
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.
How many pairs of two - digit natural numbers have a difference equal to 40? 
In a town, 45% are adults. How many children are there in the town if there are 675 adults? 
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? 
 .
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? 
The original price of an umbrella is $15. What is its price after two times 10% dicount? 
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? 
What is 25% of ? (Write your answer by natural number or decimal in the simlest form). ..
 ..