**Question 1:** Choose the calculation that has the greatest result.

a. 125,7 : 3 + 14,3

b. 365,5 : 5 - 17,8

c. 59,8 : 2 + 26,13

d. 196,4 : 4 - 7,07

**Question 2:** Peter counts his heart rate. He counts 8 beats per 6 seconds on average. How many beats per minute does Peter count?

a. 75 b. 140 c. 60 d. 80

Question 3: Which fraction is equal to 17,5%?

a. 35/20 b. 7/40 c. 35/50 d. 175/100

**Question 4:** Mia wants to buy apple. Which is the best buy?

a. 7kg of apples for $30,38

b. 5kg of apples for $21,5

c. 6kg of apples for $26,1

d. 4kg of apples for $17,32

**Question 5:** The product: 20 x 21 x 22 x ..... x 40 has ....... digit 0.

a. 4 b. 6 c. 5 d. 3

**Question 6:** Which shape is colored more than 50% in green?

**Question 7:** If number A is increased by 60% then it will equal number B. How much percentage will B be decreased by to equal A?

a. 40% b. 62,5% c. 37,5% d. 60%

**Question 8:** Find the smallest number that is 7 times the sum of its digits?

a. 28 b. 21 c. 14 d. 35

**Question 9:** Calculate:Choose the correct answer:

a. 767/768 b. 711/768 c. 255/256 d. 85/256

**Question 10:** How many fractions equal 1/5 and have denominators of 2 - digit numbers?

a. 16 b. 18 c. 22 d. 20

**Exam number 2: Your car has to pass 5 obstacles to finish. In order to overcom each obstacle, you have to answer correctly one of three problems in that obstacle. (Vượt chướng ngại vật)**

**Question 1:** If and n is a natural number then n = ...........

**Question 2: **

The perimeter of the shape is ....... cm.

Question 3: Find X if X x 8,6 - 5,2 x X - 11,06 = 5,94

**Question 4:** Calculate: 5,5 x (3,5 - 1,5) + 1,5 = ..............

**Question 5: **Calculate:

**Exam number 3: Find the blank with the suitable number**

(Note: write decimal number with the comma" between number part and fraction part. Ex: 0,5)

**Question 1:** 5,136m^{3} = ............ cm^{3}.

**Question 2:** 47/250 dm^{3} = ............. cm^{3}.

**Question 3:** The perimeter of a circle is 15,7dm. Its area is ....... cm^{2}.

**Question 4:** Jane bought a couch. A couch costs 950 dollars. She received a 30% discount. How much of a discount did she get?

**Question 5:** The ratio of the number of girls to the number of boys in a classroom is 5 : 4. When 10 girls left the classroom, the ratio of the number of boys to the number of girls became 4 : 3. How many students were in the classroom at first?

**Question 6:** The area of a rectangle is 50m2. If it's length is increased by 10% and it's width is decreased by 20% then the area of new rectangle is ...............m^{2}.

**Question 7:** An aquarium is 8dm deep, 12dm long and 0,3m wide. What is the volume of the aquarium in cubic centimeter?

**Question 8:**

The sum of all square's area in the following figure is 375cm2. The area of the biggest square is ............ dm2.

**Question 9:** At a party 60% of the boys are dancing with 80% of the girls. How many people are dancing if there are 35 people? (A pair cludes only one boy and one girl)

**Question 10:**

Look at the following figure. AF/AB = 1/4; AE/AC = 1/3. If the area of triangle GBD is 270m^{2} then the area of the triangle GCD is .......... m^{2}.