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Factors and Multiples I

Whole Numbers

Fractions I

Method of Assumption

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Patterns P4

Interval Problems

Question 1 of 18

Which one of the following pairs of numbers is the common factors of 18 and 50?

1 and 2

1 and 5

1 and 6

2 and 3

None of the above

Sorry. Please check the correct answer below.

Pencils come in packages of 10. Erasers come in packages of 12. Phillip wants to purchase the smallest number of pencils and erasers so that he will have exactly 1 eraser per pencil. How many packages of pencils and erasers should Phillip buy?

3 packets of pencils, 4 packets of erasers

4 packets of pencils, 3 packets of erasers

6 packets of pencils, 5 packets of erasers

5 packets of pencils, 6 packets of erasers

None of the above

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6 packets of pencils, 5 packets of erasers

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List the factors of 36 and 84 and calculate the difference between the 2$^{nd}$ and 3$^{rd}$ common factors of these 2 numbers. Thereafter, state the HCF of these 36 and 84?

None of the above

Sorry. Please check the correct answer below.

36 = 1 $\times$ 36
= 2 $\times$ 18
= 3 $\times$ 12
= 4 $\times$ 9
= 6 $\times$ 6
84 = 1 $\times$ 84
= 2 $\times$ 24
= 3 $\times$ 28
= 4 $\times$ 21
= 7 $\times$ 12
Difference between 2$^{nd}$ and 3$^{rd}$ common factor = 2 – 1 = 1
HCF = 12

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List the multiples of 6 smaller than 57?

6,12,18,22,30,36,42,48,54

6,12,18,24,33,36,42,48,54

6,12,18,24,30,38,42,48,54

6,12,18,24,30,36,42,48,54

None of the above

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6,12,18,24,30,36,42,48,54

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List all the multiples of 7 which are smaller than 60?

7,14,18,28,35,42,49,56

7,14,21,26,35,42,49,56

7,14,21,28,35,42,49,56

7,14,21,28,38,42,49,56

None of the above

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7,14,21,28,35,42,49,56

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The basketball team and the volleyball team are sharing the basketball court for their practices today. The basketball team has practice every 3 days while the volleyball team practices every 7 days. How many days from now will they have to share the basketball court again?

15 days later

18 days later

21 days later

25 days later

None of the above

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21 days later

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Which one of the following numbers is $not$ a multiple of 6?

None of the above

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List the first 7 multiples of 8?

8,16,24,32,40,48,56

8,16,26,32,40,48,56

8,16,24,36,40,48,56

8,16,24,32,42,48,56

None of the above

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8,16,24,32,40,48,56

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Will and Jake are in different Mathematics classes at Greenwood Primary School. Will's teacher always gives tests with 9 questions while Jake's teacher gives more frequent tests with only 7 questions. However, both teachers promised that all the students in both classes will have to answer the same number of tests questions in total in one year. How many more tests does Jake have to sit for in one year, as compared to Will?

1 more tests than will

2 more tests than will

3 more tests than will

4 more tests than will

None of the above

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2 more tests than will

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List the multiples of 6 and 4, up to 50, and calculate the difference between the 2$^{nd}$ and 4$^{th}$ common multiples of these 2 numbers. Thereafter, state the LCM of these 6 and 4.

None of the above

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$Answer Image$

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Which one of the following pairs of numbers gives common multiples of 8 and 12?

1 and 2

16 and 56

24 and 72

12 and 32

None of the above

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24 and 72

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Which one of the following numbers is $not$ a factor of 64?

None of the above

Sorry. Please check the correct answer below.

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Felix and Amy take 4 and 7 minutes to run around the track during their PE lessons. If they started running their laps at 1000, when is the next time both of them will be at the finish line together after that?

22 minutes

24 minutes

26 minutes

28 minutes

None of the above

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$Answer Image$

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28 minutes

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List all the factors of 48?

1, 2, 3, 4, 6, 8, 10, 12, 24, 48

1, 2, 3, 4, 6, 8, 10, 12, 20, 48

1, 2, 3, 4, 6, 8, 12, 16, 24, 48

1, 2, 3, 4, 6, 8, 12, 18, 26, 48

None of the above

Sorry. Please check the correct answer below.

48 = 1 $\times$ 48
= 2 $\times$ 24
= 3 $\times$ 16
= 4 $\times$ 12
= 6 $\times$ 8
Factors of 48 = 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

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1, 2, 3, 4, 6, 8, 12, 16, 24, 48

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48 = 1 $\times$ 48
= 2 $\times$ 24
= 3 $\times$ 16
= 4 $\times$ 12
= 6 $\times$ 8
Factors of 48 = 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

Charlie has 36 black pebbles and 24 yellow ones. If he wants to place them in identical groups without any marbles left over, what is the greatest number of groups Charlie can make?

None of the above

Sorry. Please check the correct answer below.

36 = 1 $\times$ 36
= 2 $\times$ 18
= 3 $\times$ 12
= 4 $\times$ 9
= 6 $\times$ 6
24 = 1 $\times$ 24
= 2 $\times$ 12
= 3 $\times$ 8
= 4 $\times$ 6
Each group should contain 2 block and 3 yellow pebbles.
Largest number of groups = 12

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List the factors of 27?

1, 3, 6, 27

1, 3, 7, 27

1, 3, 8, 27

1, 3, 9, 27

None of the above

Sorry. Please check the correct answer below.

27 = 1 $\times$ 27
= 3 $\times$ 9
Factors of 27 = 1, 3, 9, 27

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1, 3, 9, 27

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27 = 1 $\times$ 27
= 3 $\times$ 9
Factors of 27 = 1, 3, 9, 27

List the factors of 60?

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

1, 3, 4, 5, 6, 7, 10, 12, 15, 20, 30, 60

1, 2, 3, 4, 6, 7, 10, 12, 18, 20, 30, 60

1, 2, 3, 4, 5, 6, 10, 12, 18, 24, 30, 60

None of the above

Sorry. Please check the correct answer below.

60 = 1 $\times$ 60
= 2 $\times$ 30
= 3 $\times$ 20
= 4 $\times$ 15
= 5 $\times$ 12
= 6 $\times$ 10
Factors of 60 = 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

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1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

You are Right

60 = 1 $\times$ 60
= 2 $\times$ 30
= 3 $\times$ 20
= 4 $\times$ 15
= 5 $\times$ 12
= 6 $\times$ 10
Factors of 60 = 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

Find the greatest number which divides 38 to leave a remainder of 4 and which also divides 58 to leave a remainder of 7.

None of the above

Sorry. Please check the correct answer below.

38 – 4 = 34
58 – 7 = 51
34 = 1 $\times$ 34
2 $\times$ 17
58 = 1 $\times$ 51
3 $\times$ 17
17 is the largest number that fits the conditions

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You are Right

38 – 4 = 34
58 – 7 = 51
34 = 1 $\times$ 34
2 $\times$ 17
58 = 1 $\times$ 51
3 $\times$ 17
17 is the largest number that fits the conditions

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