Math Mastery

What is 25% of 80?

• 25

• 20

• 15

• 30

Calculate the average of 12, 15, 18, and 21.

• 16.5

• 20.5

• 14.5

• 17.5

If the ratio of boys to girls in a class is 3:2 and there are 25 students in total, how many boys are there?

• 15

• 20

• 10

• 18

If a recipe calls for 2 cups of flour and 1 cup of sugar, what is the ratio of flour to sugar?

• 2:1

• 3:1

• 2:2

• 1:2

If the price of a shirt is increased by 20% from $25, what is the new price?

• $27

• $22

• $30

• $32

Simplify the proportion: 3/5 = x/15.

• 6

• 12

• 9

• 18

What percentage of 200 is 50?

• 25%

• 40%

• 30%

• 20%

The average of 5 numbers is 20. If 4 of the numbers are 15, 25, 30, and 35, what is the fifth number?

• -5

• 10

• 50

• 40

If the ratio of red balls to blue balls is 2:3 and there are 40 blue balls, how many red balls are there?

• 35

• 26

• 15

• 30

If a car travels 240 miles in 4 hours, what is its average speed in miles per hour?

• 120

• 60

• 40

• 80