Mathematical Challenge

Simplify the algebraic expression: 3x + 2y - 5z

• 3x + 2y + 5z - 5z

• 3x + 2y + 5z

• 3x + 2y - 5z

• 3x - 2y - 5z

Solve the linear equation: 2x + 3 = 11

• x = 2

• x = 4

• x = 7

• x = 5

Calculate the area of a rectangle with length 6 cm and width 4 cm

• 20 square cm

• 30 square cm

• 24 square cm

• 10 square cm

Which of the following numbers is a rational number: 0.5, √2, -3, 1/2?

• √2

• 0.5

• -3

• 2/3

In a class of 30 students, 18 like Math, 12 like Science, and 5 like both. How many students like only one subject?

• 18

• 10

• 15

• 20

Factorize the expression: 4x^2 - 9

• (2x + 3)(2x - 3)

• (4x + 3)(4x - 3)

• (2x - 3)(2x + 3)

• (2x + 3)(2x + 3)

Find the value of x in the equation: 3(x + 4) = 21

• x = 8

• x = 3

• x = 5

• x = 6

Determine the perimeter of a square with side length 5 cm

• 20 cm

• 25 cm

• 15 cm

• 10 cm

Which of the following is not a rational number: 0.25, -1/3, √5, 2.5?

• -1/3

• 2.5

• 0.25

• √5

Given the data set: 2, 4, 6, 8, 10, find the mean.

• 4

• 7

• 12

• 6