九至十年级知识竞赛

Solve for x: 2x + 5 = 15

• 7

• 3

• 5

• 10

What is the ratio of 8 to 12 in simplest form?

• 1:2

• 4:5

• 2:3

• 3:4

Calculate the area of a rectangle with length 5 and width 3.

• 12

• 8

• 20

• 15

What is the perimeter of a triangle with sides 3, 4, and 5?

• 14

• 10

• 12

• 8

If a graph shows 20 students and 5 are absent, what percentage are present?

• 60%

• 70%

• 75%

• 80%

Use the Pythagorean theorem to find the hypotenuse of a right triangle with legs of 6 and 8.

• 10

• 14

• 8

• 12

If a recipe calls for a ratio of 2:3 for sugar to flour, how much flour is needed for 4 cups of sugar?

• 6 cups of flour

• 4 cups of flour

• 8 cups of flour

• 5 cups of flour

What is the area of a circle with a radius of 7?

• 154.00

• 150.00

• 160.00

• 153.86

Find the perimeter of a square with a side length of 10.

• 20

• 30

• 40

• 50

Interpret the bar graph showing sales: if the highest bar is 50, what does it represent?

• The highest bar indicates a sales figure of 25.

• The highest bar represents the average sales figure.

• The highest bar shows the total sales for the year.

• The highest bar represents the maximum sales figure of 50.