?????
Shape and Space 8
Number 9
Handling Data 5
100

Arrange in descending order

0.0035, 0.0039, 0.00038, 0.003


0.0039, 0.0035, 0.003, 0.00038

100

Exercise 4* : Question 1

m = 3 and n =1

100

Price of two chocolates are given as follows and which is better for value?
Vanilla :$1.90/500g
Strawberry : $0.76/200g

Both are same in value
Vanilla : 1000g : $1.90*2 = $3.80
Strawberry : 1000g : $0.76*5 = $3.80

100

What is the probability of getting a diamond from a deck of cards

1/4

200

When I was 6 years old, my brother was half my age. Now I am 18 years old so how old is my brother?

Age difference is 3 therefore the age is
18 - 3 = 15 years

200

Exercise 4 : Question 3
Find CB

 - x + y

200

John buys a coffee maker for $437 inclusive of sales tax at 15%
Calculate the original price excluding sales tax

$437/1.15 = $380
200

Peter's probability of winning the lottery is 0. How could you describe this event?

Impossible

300

If 2 + 4 = 10
   4 + 6 = 28
   5 + 2 = 15
   6 + 3 = 24 

then, 7 + 9 = ?????

9 * 7 = 63
63 + 7 = 70

70

300

Exercise 4 : Question 5
Find FB

2y - x

300

$1 = £0.70 and $1 = €0.92
Convert €120 into £ 

€120/0.92 = $130.43
$130.43*0.70  = £130.43

Answer £130.43

300

Emma's probability of winning the race is 0.4. Is she likely/unlikely/impossible to win the race

Unlikely

400

Simplify
(-3a)3 / (3a-3)

-27 / 3 = -9
a3-(-3) = a6

Answer : -9a6

400

Exam Practice : Question 3
(d) part

m - n

400

Mr. X earns $120,000 p.a and Mr. Y earns $90,000 p.a
Calculate the total income tax per week.
(Hint : There are 52 weeks in a year)
Tax Rate : 20% for below and equals $50,000
                40% for above $50,000

(50,000*0.2  +  70,000*0.4) / 52 = $730.77
(50,000*0.2  +  40,000*0.4) / 52 = $500

Total : $1,230.77

400

Probability of Richard winning badminton is 0.7
Probability of Richard winning football is 0.6

Calculate the probability that Richard wins one game and loses the other.

(0.7*0.4) + (0.3*0.6) = 0.46
500

If a=4, b=5, solve 
a3 + (5b - 3)

64 + 26 = 86

500

Exercise 4* : Question 6
Find MN

3/5y

500

The price of the paint $x is reduced by 15%.
Sales tax of 15% is then added so the final cost is $46.92
Find the value of $x

$46.92 / 1.15 = $40.8
x - 0.15x = 0.85x
0.85x = $40.8
x = $40.8/0.85

x = $48

500

What is the probability of picking two 10s in a row without replacing?

1           3                  3           1
---    x   ----    =       ----   =  -----
13         51               663        221

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