Factorise 27x + 9

• 27(x + 1)

• 27(x + 9)

• 9(3x + 1)

• 9(3x +9)

Which of the following is true?

• -(6 × m)= -m × (-6)

• 5t = t × t × t × t × t

• 5a - (-6a) = 4a + 7a

• 8a × 3 = (-6 ) × 4a

Which of the following is equal to 3m-2n+7m+5n ?

• 10m+3n

• 10m-3n

• 10m+7n

• 10m-7n

^{X + (x + 1) + (x + 2) = 108}

^{What is a value of x ?}

• 39

• 21

• 34

• 35

If a/b = 2, what is a value of 4b/a ?

• 0

• 1

• 2

• 4

Find the heights of the red bar. (HOTS !)

• 4m

• 12m

• 7m

• 8m

What percent of 25 is 20 ?

• 40%

• 50%

• 60%

• 80%

Answer explanation

"25 is 20" means 20/25

Given V = (4/3)r³ , find the value of r when V = 36.

• 1

• 2

• 3

• 4

Given x = √2y + 1 , express y in the term of x.

• y = √x - 1 / 2

• y = x + 1

• y = x² - 1 / 2

• y = x² + 1 / 2

Express the variable in the bracket as the subject of the formula.

• z = y - x / 2

• z = √(x² + y²)

• z = y + x² / 2

• z = √(x² - y²)