Math round 6

A box contains 30 balls red and white balls the probability of getting a red is 0.3 then , then the number of the red balls = ......

• 15

• 3

• 9

• 10

How many triangles are there in the picture below?

• 32

• 33

• 34

• 35

What is the missing number?

• 9
• 18
• 34
• 22

Which number is not equivalent to the others? 
0.5      1/5       5/25      20%

• 0.5
• 1/5
• 5/25
• 20%

If two sides of a parallelogram are 6cm and 12 cm long, what is its perimeter?

• 34 cm

• 35 cm

• 36 cm

• 38 cm

Caroline is x years old. Lucero is 5 times the age of Claudia. Kelly is 3 years younger than Lucero. What is Kelly's age?

• 5x - 3

• 5(x - 3)

• x + 3

• 7

Expand

(4n - 5)(2n + 5)

• 8n² + 10n - 25

• 7n² + 27n - 4

• 56n² + 4n - 16

• 56n² - 16

Each table at a park seats 4 people. How many tables will 84 people at a family reunion need?

• 20 tables

• 21 tables

• 22 tables

• 19 tables

 What is the area of the shaded region?

• 19.8 cm2
• 25.16 cm2
• 32.6 cm2
• 14.96 cm2

Calculate the volume:

• 1120 ft ³ 

• 560 ft ³

• 600 ft ³

• 64 ft ³