8A Semester 1 Jeopardy

Numbers/Pythagoras

100

Solve: -5 - 9

-14

200

3 - (5 x 9 + 4) - 6

- 52

300

What is 190 minutes after 3pm in 24 hour time?

1810 hours

400

If a right angled triangle has short sides of 5m and 8m, what is the length of the hypotenuse?

√89m

500

Two buildings are 25m apart. There is a 50m long cable connecting the tops of each building (on the edge closest to each other). What is the difference in height of the two buildings (nearest m)?

43m

Algebra

100

Simplify: x + 4x + 2

5x + 2

200

What is the value of 3x - 2y if x = -4 and y = 3?

-18

300

Expand and Simplify

3(x - 2) + 5(2 - x) 

4 - 2x (or -2x + 4)

400

Write an algebraic expression for:

The product of 'a' and the difference between 'b' and 3

a x (b-3)

500

Factorise

16xy - 14y + 4y² 

2y(8x - 7 + 2y)

Index Laws

100

What does a⁵ x a² equal?

a⁷

200

Give the value for (2x)⁰

1

300

Expand (3a²b)²

9a⁴b²

400

Simplify

(5m⁶ x 3mn) / (6n)²

5m⁷ / 12n

500

Express using Positive Indices:

3a^-5 / b^-2c

3b² / a⁵c

Measurement

100

How many millimeters in a centimeter?

10

200

What is the formula for the circumference of a circle?

𝝅d or 2𝝅r

300

A carton has a volume of 3500cm³. What is its capacity in Litres?

3.5L

400

The bases of a trapezium are 4km and 8km long, and its height is 6km. What is its area?

36km²

500

A cube has a surface area of 54cm². 

What is its volume?

27cm³

Rates/Ratios

100

Simplify this ratio:

3:6:9

1:2:3

200

Mr James travels 120km in 3 days.

 Express this as a rate.

40km/day

300

Jeremy splits $150 into his spending and savings account in the ratio 2:3. 

How much does he save?

$90

400

Ben buys 'p' pens for 's' dollars. What is the price of 2 pens?

(Hint, find the price of 1 pen first). 

$2s/p

500

Usain Bolt sprints 100m in 9.6s. What is his average speed in km/h (to one d.p.)?

37.5km/h