Mathematics Challenge for Grade 9

1. What is the value of x in the equation 2x + 3 = 11?

• 4

• 5

• 7

• 2

A) 2 B) 3 C) 4 D) 5

• 3

• 7

• 6

• 1

2. Which of the following is a prime number?

• 2

• 4

• 9

• 6

A) 4 B) 6 C) 7 D) 8

• 9

• 5

• 10

• 8

3. What is the area of a triangle with a base of 10 cm and a height of 5 cm?

• 30 cm²

• 15 cm²

• 20 cm²

• 25 cm²

A) 25 cm² B) 30 cm² C) 35 cm² D) 40 cm²

• B) 30 cm²

• 45 cm²

• 50 cm²

• 20 cm²

4. If the circumference of a circle is 31.4 cm, what is its radius? (Use π = 3.14)

• 4 cm

• 7 cm

• 5 cm

• 6 cm

A) 5 cm B) 6 cm C) 7 cm D) 8 cm

• 10 cm

• 9 cm

• 4 cm

• 6 cm

5. What is the solution to the inequality 3x - 5 < 4?

• x > 3

• x = 3

• x < 1

• x < 3

A) x < 3 B) x > 3 C) x < 2 D) x > 2

• A) x < 1

• D) x > 2

• C) x < 4

• B) x = 3