2026 Year 9 Semester 1

Financial Maths

100

Money earned at an hourly rate is called...

Wage

200

If $240 is invested at a rate of 5%p.a. for 9 years, how much simple interest is earned?

$108

300

How much money is earned for a 48 hour work week where 8 hours is at time-and-a-half and the usual wage is $20/h?

$1040

400

What is the compound interest formula?

A = P(1+r/n)^nt

500

Which account should I invest my money in to earn the most interest? An account earning 4.3% p.a. for 4 months, or and account earning 5.2% p.a. for 3 months? Both are compounded monthly.

4.3% p.a. for 4 months.

Trigonometry

100

What trigonometry function do you use if you know the adjacent and the opposite sides?

tan

200

Theta= sin^-1(?/hyp)

Opposite

300

Which way do you rotate when measuring true bearings?

Clockwise

400

If the hypotenuse of a triangle is 16m and the adjacent if 4m, what is the unknown angle?

75.52⁰

500

If a triangle has an angle of 40⁰ and an opposite side of 15.4m, how long is the hypotenuse of the angle?

23.96m

Algebraic Techniques

100

What is a variable? Give an example.

A letter that represents an unknown value. An example is x.

200

Combine the like terms: 

2y + 10w + 6t – 8m – 15k

2y + 10w + 6t – 8m – 15k

300

Simplify:

4a²b⁶c/8a²bc³

b⁵/2c²

400

Expand:

2a(3b - 4a)

6ab - 8a²

500

Expand and simplify:

(x+2)(x-5)

x² - 3x - 10

Equations

100

x/4 = 10

x=40

200

2x - 1 = 9

x=5

300

4(2x - 1) = 12

x=2

400

3x + 6 = 7x - 5

x=11/4

500

5(4x + 5) = 4(2x + 4)

-9/12

Maths Facts

100

How many meters are 3.4kms?

3400m

200

What is the formula for the area of a circle?

A=pi x r²

300

What is the first three digit square number?

100

400

The number pi and the angle theta are represented using letters of which alphabet?

The greek alphabet

500

What is the name of the branch of Mathematics that involves shapes?

Geometry