Grade 10 Mathematics Quiz

Which of the following is both a factor of 144 and a multiple of 12?

• 18

• 36

• 2

• 96

The HCF of two numbers is 14 and their LCM is 168. If one number is 28, what is the other?

• 42

• 58

• 84

• 98

Simplify: (3/5 + 4/15) ÷ (2/3)

• 13/10

• 17/10

• 17/6

• 17/9

A virus population doubles every hour. If the initial population is 2.5 × 10^3, what is the population after 3 hours, in standard form?

• 2.0 × 10^4

• 2.0 × 10^3

• 2.0 × 10^5

• 2.0 × 10^6

Write 0.00084 ÷ (2.1 × 10^(-4)) in standard form.

• 4 × 10^0

• 4 × 10^1

• 4 × 10^2

• 4 × 10^(-1)

Estimate square root of 41 times 18.4 by rounding each number to 1 significant figure.

• 280

• 270

• 126

• 360

Round 0.005628 to 2 significant figures.

• 0.0056

• 0.00563

• 0.0057

• 0.0060

Estimate (384 × 21.8) ÷ 9.7 using 1 significant figure for each number.

• 800

• 900

• 1000

• 1100

Factorise completely: 6x^2 - 15x

• 3x(2x - 5)

• x(6x - 15)

• 3(2x^2 - 5x)

• x(2x - 5)

Expand and simplify: (x - 4)^2 - (x + 3)(x - 3)

• x^2 - 8x + 7

• x^2 - 7x + 1

• -7x + 1

• -8x + 25