Câu 6:
4.8l of oil weigh 3.648kg. How many liters of oil are there if they weigh 4.864kg?
Answer: There are  liters
(Write your answer as a decimal in the simplest form)

Câu 7:
Inspecting products of a factory, we find that there are 97 qualified products out of every 100 products on average. What percent of the total products is qualified products?
Answer:  %

Câu 8:
A rectangular field has a width of 24.5m and its area equals the area of a square with the sides of 35m. Find the perimeter of that rectangular field.
Answer: m

Câu 9:
The area of a triangle ABC is , take the point M on BC such that BM=MC and the point N on AC such that AN=NC. Find the area of the triangle AMN.
Answer:  

Câu 10:
A store sold 902kg of rice which is 10.25% of the total amount of rice. How many kilograms of rice were there in that store at first?
Answer: There were  kilograms

Fill in the blank with the suitable number
Question 1:
Fill missing number in the blank
41165+23042=23042+
Question 2:
Fill missing number in the blank
54723+
=27849+54723
Question 3:
Calculate: 4159+2615+421=
Question 4:
The sum of two numbers is 98 and their difference is 24. The greater number is 
Question 5:
If a square has one side’s length is 12cm then its perimeter is 
cm
Question 6:
Find the value of 2356+a-b for a=1482, b=3105
Answer: 
Question 7:
Think of a number that if you add 720 to it the answer will be 1427. The number is 
Question 8:
If the perimeter of a square is 104m then its one side’s length is 
m
Question 9:
I am an even 2-digit number. The sum of my tens digit and my ones digit is 11 and their difference is 5. Who am I?
Answer: 
Question 10:
The perimeter of a rectangle is 72cm and its length is 12cm more than its width. Its length is 
cm

1.  Two bisector BD and CE of the triangle ABC intersect at O. Suppose that BD.CE = 2BO.OC . Denote by H the point in BC such that .\(OH⊥BC\) . Prove that AB.AC = 2HB.HC

2. Given a trapezoid ABCD with the based edges BC=3cm , DA=6cm ( AD//BC ). Then the length of the line EF ( \(E\in AB,F\in CD\) and EF // AD ) through the intersection point M of AC and BD is ............... ?

3. Let ABC be an equilateral triangle and a point M inside the triangle such that \(MA^2=MB^2+MC^2\) . Draw an equilateral triangle ACD where \(D\ne B\) . Let the point N inside \(\Delta ACD\) such that AMN is an equilateral triangle. Determine \(\widehat{BMC}\) ?

4. Given an isosceles triangle ABC at A. Draw ray Cx being perpendicular to CA, BE perpendicular to Cx \(\left(E\in Cx\right)\) . Let M be the midpoint of BE, and D be the intersection point of AM and Cx. Prove that \(BD⊥BC\)

Exam number 2

Fill in the blank with the suitable number

Question 1
Find the value of 
Answer: ........

Question 2
Fill missing number in the blank
54723+........=27849+54723

Question 3:
Fill missing number in the blank
41165+23042=23042+.........

Question 4:
Calculate: 4159+2615+421=.........

Question 5:
Find x such that x+24360=41256
Answer: x=........

Question 6:
If the perimeter of a square is 104m then its one side’s length is : ........ m

Question 7:
If a square has one side’s length is 12cm then its perimeter is : ........ cm

Question 8:
Find y such that y – 12358=18031 
Answer: y=............

Question 9:
The perimeter of a rectangle is 36cm and its length is 6cm more than its width. Its area is : ........

Question 10:
Find the value of b such that b5 x 5 = 75
Answer: b=.........