Year 8 Revision

Percentages

100

10% of $20

$2

200

20% of $150

$30

300

Express 22/30 as a percentage (whole number)

73%

400

45% of $700

$315

500

Express 1.15 as a percentage

115%

GST

100

How much GST is payable on $340

$34

200

What is the final price of something that has a Pre-GST price of $200?

$220

300

A painting was bought and the GST equals $39.00. Find the total sale price

$429

400

What does GST stand for

Goods and Services Tax

500

Find the pre-GST of an item that costs $350 (to the nearest cent)

$336.36

Area

100

What is the area of a square with side length 4cm?

16cm²

200

What is the area of a rectangle with side lengths 5cm and 3cm?

15cm²

300

What is the area of a circle with radius 2cm. (2 dec. place)

12.57cm²

400

What is the circumference of a circle with diameter 6? (2 dec. place)

18.85cm²

500

What is the area of a circle with diameter 45cm? (2 dec. place)

1590.43cm²

Indices

100

Expand 3⁵

3 x 3 x 3 x 3 x 3

200

Simplify: 3³ x 3⁴

3⁷

300

Simplify: 3 x 3⁰

3

400

Simplify: (3mn³)²

9m²n⁶

500

(4p³h¹⁰)² x 2p²h⁹

32p⁸h²⁹

Indices #2

100

Put in index form: 4 x 4 x 4 x 4

4⁴

200

Simplify: 6⁶/6²

6⁴

300

Simplify: (3⁴)⁴

3¹⁶

400

8a²w² x 5a³w⁷

40a⁵w⁹

500

4p³h¹⁰ / 2p²h⁹

2ph