Term 1 Revision

Question 1

Give the first 4 multiples of 6.

Answer 1

6, 12, 18, 24

Question 2

What is the lowest common multiple (LCM) of 3 and 5?

Answer 2

15

Question 3

What are the factors of 24?

Answer 3

1, 24 2, 12 3, 8 4, 6

Question 4

What is the highest common factor (HCF) of 24 and 40?

Answer 4

8

Question 5

Is 1 a Prime Number?

Answer 5

No

Question 6

Give the first 5 Prime Numbers.

Answer 6

2, 3, 5, 7, 11.

Question 7

What are the Prime Factors of 50?

Answer 7

2x5x5

Question 8

If a^2 = 25, what is a?

Answer 8

5

Question 9

What does BEDMAS stand for?

Answer 9

Order of operations. Brackets, Exponential, Division, Multiplication, Addition, and Subtraction. We always solve the equation from left to right if order of operation is the same.

Question 10

What is the value of the 9 in 3065.192?

Answer 10

9/100 or 9 hundredths

Question 11

What is the value of the 6 in 3065.192?

Answer 11

60

Question 12

Round 3065.192 to 2 dp.

Answer 12

3065.19

Question 13

Round 3065.192 to 1 dp.

Answer 13

3065.2

Question 14

How many significant figues does 3065.192 have?

Answer 14

7

Question 15

Round 3065.192 to 3 s.f.?

Answer 15

3070 (the last 0 is not a significant figure)

Question 16

What number is 3.521 x 10^2?

Answer 16

352.1

Question 17

Write 3065.192 in Standard Form.

Answer 17

3.065192 x 10^3

Question 18

Write 0.00324 in Standard Form.

Answer 18

3.24 x 10^-3

Question 19

Which is larger 1/3 or 2/5?

Answer 19

2/5

Question 20

What is 1/3 of 69?

Answer 20

23

Question 21

Amy put 2 kg of sweets in 12 bags. What i sthe weight of sweets in each bag?

Answer 21

1/6 kg

Question 22

What is 1/4 of 2 dozen?

Answer 22

6

Question 23

What is 1/3 + 2/5?

Answer 23

11/15

Question 24

What is 1/3 x 2/5?

Answer 24

2/15

Question 25

What is 1/3 divided by 2/5?

Answer 25

5/6

Question 26

3/5 of Ben's house is carpeted. 2/3 of the carpet is grey. What fraction of the house has grey carpet?

Answer 26

3/5 x 2/3 = 6/15

Question 27

$100 is shared in the ratio of 2:3:5. How much does each get?

Answer 27

$20, $30 and $50

Question 28

There are 17 boys and 13 girls. What is the ratio of boys to girls?

Answer 28

17:13

Question 29

There are 17 boys and 13 girls. What is the ratio of boys to total number of students?

Answer 29

17:30

Question 30

Divide $120 in the ratio 2:3.

Answer 30

2/5 x 120 = $48 3/5 x 120 = $72

Question 31

Jerry earns $65 for 5 hours work. What is his rate of pay?

Answer 31

$13/hour

Question 32

Joe plants 4 rows of potatoes in 2 hours. How long will it take him to plant 10 rows?

Answer 32

5 hours (2 rows in 1 hour, so 10/2 hours)

Question 33

What is 0.23 as a percentage?

Answer 33

23%

Question 34

What is 7.6% as a decimal?

Answer 34

0.076

Question 35

What is 15% of $200?

Answer 35

$30

Question 36

How do you calculate a percentage of an amount?

Answer 36

Percentage/100 x amount.

Question 37

50% of an amount is $60, what is the original amount?

Answer 37

$120. Calculate by dividing the 60 by 0.5.

Question 38

Increase $50 by 12%.

Answer 38

$56 (12% of 100 is 12 so 12% of 50 is 6)

Question 39

Joe had a salary increase of 10%. His original salary was $56,000, what is his nwe salary?

Answer 39

$61,600 (56,000 x 1.1)

Question 40

Tane's new salary is $70200. He had a salary increase of 8%. What was his old salary?

Answer 40

$65000 (70200/1.08 = 65,000)

Question 41

A shop has a special sale on and is taking off GST. The original price is $100. What is the sale price?

Answer 41

$86.95. (100/1.15)

Question 42

Tom buys shoes for $30 and wants to add 25% mark-up to it. Then he has to add GST. What is the selling price?

Answer 42

30 x 1.25 = 37.50 37.50 x 1.15 = 43.13 Selling price is $43.15 rounded up.

Question 43

How to go from GST Exclusive to GST Inclusive?

Answer 43

Multiply the GST Exclusive price by 1.15.

Question 44

How to go from GST Inclusive to GST Exclusive?

Answer 44

Divide the GST Inclusive price by 1.15.

Question 45

If a = 4 and b = 2 what is 2a - 3b?

Answer 45

2