Ratio and Proportion Quiz for Grade 12

What is the ratio of 24 to 36?

• 2:3

• 4:5

• 3:2

• 1:2

If 15 men can complete a task in 20 days, how long will 10 men take to complete the same task?

• 25 days

• 30 days

• 35 days

• 40 days

The ratio of the ages of A and B is 4:5. If A is 24 years old, how old is B?

• 20

• 28

• 30

• 32

What is the solution to the equation: 2x + 3 = 11?

• x = 4

• x = 5

• x = 3

• x = 2

Simplify the expression: 3x - 2 + 5x + 4.

• 8x + 2

• 6x + 6

• 7x + 3

• 8x + 4

The sum of two numbers is 40, and their ratio is 3:5. What is the smaller number?

• 10

• 15

• 20

• 12

If the ratio of boys to girls in a class is 3:4 and there are 12 boys, how many girls are there?

• 8

• 12

• 16

• 18

Solve the equation: 5x - 7 = 2x + 5.

• x = 3

• x = 4

• x = 5

• x = 6

What is the value of 2a^2 - 3a + 4 when a = 2?

• 6

• 8

• 10

• 12

If the ratio of two numbers is 7:3 and their difference is 20, what is the smaller number?

• 10

• 15

• 20

• 30