YEAR 10 REVISION JEAPORDY

Number

GROUP RULES: DECIDE ON ROLES Writer: writes answers on whiteboard Thinker: on paper/in head. Resources Manager: looks up

notes/textbooks All members: ensure group is positive &

working at a reasonable noise level.

All people must participate. Random checks may be made to ensure all group members know how to get their correct answer. (Bonus points available for this)

HOW TO PLAY Group x chooses the question Time limit given When time is up, group x has 1st option

to answer. If correct winner takes all points. If incorrect, all other correct groups get

half points. Next group in turn (clockwise).

CHOOSE YOUR QUESTION!Money Fractions Percentage

sIntegers & time

10 10 10 1020 20 20 2030 30 30 3040 40 40 40

100 100 100 100

MONEY 10 POINTS Joe buys a shirt in a 15% off

sale. It’s normal price was $18. What will Joe pay?

$15.30

MONEY 20 POINTS What would 7 books at $4.65 cost in

total?

$32.55

MONEY 30 POINTS Share $63 in a ratio of 3:5:1

$21: $35: $7

MONEY 40 POINTS James invests $500 in an account

with a 6% interest rate (p.a). How much will James have after 10years (assume interest is compounded yearly)

500x1.0610

=$895

MONEY 100 POINTS Last year, beef exported to the USA was

earning US $2.29/kg. The total revenue from beef export to the USA was NZ $978.2million. A) The exchange rate was NZ$1:US$0.515

How much beef was exported to the USA?

B) In total 5.6x108kg of beef was exported around the world. What % of this went to the USA?

2.2x108kg 39%

FRACTIONS 10 POINTS

310

85

163

8015

Simplify your answer

FRACTIONS 20 POINTS

12/84=1/7

A chocolate factory increased the weight of their chocolates from 84g to 96g. Express the increase in weight as a fraction (simplify)

FRACTIONS 30 POINTS Jean has a 2L bottle of orange drink. 3/5

of it is orange juice and the rest is water (well mixed!)

Jean drinks 1/8 of the bottle and then fills it up with water.

What fraction of the of the bottle is water now?

19/40

FRACTIONS 40 POINTS

$26.25

After a price increase of 2/15, a saw now costs $29.75. What was the price before the increase?

FRACTIONS 100 POINTS Robyn is renovating her bathroom. The area to be tiled

is 9m2. She has chosen tiles which come in boxes of 40 at $65 a box; 36 tiles cover 1m2. Tiles cannot be sold seperately. Her DIY book advises buying 8% extra tiles to cover breakages and cutting halves.

A) Robyn follows the advice of her book. Calculate the cost of the tiles for the bathroom.

B) Robyn used only 330 tiles on the job. She wants to use the leftover tiles to cover an area in the toilet. What fraction of a square metre will she be able to tile assuming she doesn’t break any tiles. a)Need 324+8%=350tiles: 9

boxes: $585 b) 30 tiles left: 30/36 or 5/6m2

PERCENTAGES 10 POINTS

40kg

Find 25% of 160kg

PERCENTAGES 20 POINTS

72%

Cheryl got 18 out of 25 in a recent math test. What percentage is this?

PERCENTAGES 30 POINTS GST is 15%. What would the price of a

car be (including GST) if it costs $27300 before GST?

$31395

PERCENTAGES 40 POINTS 18% of a volume is 450mL. What is the

total volume?

2500mL

PERCENTAGES 100 POINTS

A: 5% B: $64591.50-39995=$24596.50 extra

c) $248.43.

A car dealer offers a car for $39995 cash or $2000 deposit with weekly repayments of the balance plus 14% pa of the original remaining balance for 5 years. A) What percentage of the price is the deposit? B) How much extra is paid in total with the weekly repayment scheme? C) How much is each weekly payment?

INTEGERS 10 POINTS How many seconds in 8 minutes?

480

INTEGERS 20 POINTS 285÷5

57

INTEGERS 30 POINTS Explain why -52 and (-5)2 are different.

INTEGERS 40 POINTS Hemi & Jake share a job clearing Mrs

McDonald’s garden. Hemi worked for 5h 45min, Jake worked for 2h 20min.

A) Write the ratio of Hemi’s time to Jake’s time in simplest form

B) Mrs McDonald paid $75 cash for the job. What is Hemi’s share?

a)345:140=69:28b) $53.35

INTEGERS 100 POINTS Two numbers (x & y) add to 87 and have

a difference of 29. A: Use this information to write two

equations. B: Solve the equations to find x and y.

x+y=87x-y=29

add equations: 2x=116 x=58x+y=87 so y=29