BOY Math Jeopardy (8th)

Integer Operations

100

What is - 7 + 12?

5

200

Evaluate: (- 8) — (- 3)

- 5

300

Multiply: - 6 x 4

- 24

400

Divide: (- 56) ÷ 7

- 8

500

Simplify: (-3) + (-5) x 2

- 13

Fractions, Decimals & Percents

100

What is 1/2 written as a percent?

50%

200

Convert 0.4 to a fraction in simplest form.

2/5

300

25% of 60 is what?

15

400

A shirt costs $20. It's on sale for 30% off. What is the amount of the discount?

$6

500

If 18 is 60% of a number, what is the number?

30

Expressions & Equations

100

Simplify: 3x + 2x

5x

200

Solve: x + 7 = 12

x = 5

300

Evaluate: 4a - 2, when a=3.

10

400

Solve: 5x - 4 = 16

x = 4

500

The sum of twice a number and 9 is 21. Write the equation.

2x + 9 = 21

Geometry & Measurement

100

What is the perimeter of a rectangle with length 8 and width 5?

26 units

200

Find the area of a triangle with base 10 and height 6.

30 square units

300

A square has a side length of 12 cm. What is its area?

144 cm²

400

A rectangular prism has length 5, width 3, and height 4. Find its volume.

60 cubic units

500

A right triangle has legs of 9 and 12. Find the hypotenuse.

15

Data & Probability

100

A number cube is rolled. What's the probability of rolling a 5?

1/6

200

What is the mean of the numbers: 4, 6, 8, 10?

7

300

The mode of 3, 7, 7, 8, 9, 9, 9 is what?

9

400

A bag has 3 red marbles and 5 blue marbles. What's the probability of picking red?

3/8

500

A bag has 4 red marbles, 3 blue marbles, and 5 green marbles. One marble is chosen at random. What is the probability it is not green?

7/12