Factors, Multiples and Primes

Factors, Multiples and Primes

Multiple Choice

what are the first 5 multiples of 11?

• 11, 1

• 11, 10, 9, 8, 7

• 11, 12, 13, 14, 15

• 11, 22, 33, 44, 55

Multiple Choice

what are the first 4 multiples of 14?

• 1, 2, 7, 14

• 14, 28, 42, 56

• 14, 21, 28, 35

• 14, 140, 1400, 14000

Multiple Choice

which of the following numbers is not a multiple of 12?

24, 36, 42, 120

• 24

• 36

• 42

• 120

Multiple Choice

which of the following numbers is not a multiple of 15?

150, 300, 450, 730

• 150

• 300

• 450

• 730

Multiple Choice

List all the multiplies of 3 between 60 and 80

• 63, 66, 68, 71, 74, 77

• 63, 66, 69, 71, 75, 78

• 63, 66, 69, 72, 78

• 63, 66, 69, 72, 75, 78

Multiple Choice

List all the multiples of 2 between 16 and 34

• 18,20,22,24,26,28,30,32,34

• 17,19,21,23,35,27,29,31,33

• 1, 2, 8, 16, 4

• 1, 34, 17, 2

Multiple Choice

Choose 3 common multiples of 5 and 10

• 50, 150. 200

• 15, 25, 35

• 5, 10, 20

• 10, 20, 25

Multiple Choice

Choose 3 common multiples of 6 and 12

• 12, 24, 30

• 12, 18, 24

• 12, 24, 36

• 1, 2, 3, 4, 6

Multiple Choice

A bus to Belfast leaves Antrim Bus Station every 25 minutes. The first bus each day leaves at 7am. Darren wants to get a bus after 8am. What time is the first suitable bus?

• 8:25am

• 8:50am

• 8:15am

• 8:10am

Multiple Choice

A light flashes every 8 seconds. How many times will it flash in 2 and a half minutes?

• 18

• 10

• 25

• 28

Multiple Choice

Choose the answer which lists all the factors of 10

• 1, 2, 5, 10

• 1, 10

• 5, 2

• 10, 20, 30...

Multiple Choice

Choose the answer which lists all the factors of 15

• 1, 15

• 3, 5

• 1, 3, 5, 15

• 1, 3, 5, 15, 30

Multiple Choice

Choose the answer which lists all the factors of 7

• 1, 7

• 1, 7, 3.5, 2

• 1, 7, 14, 21

• 1, 7, 14, 21, 28 35, 42, 47, 56, 63 70

Multiple Choice

Which of these numbers is not a factor of 100?

• 4

• 30

• 25

• 10

Multiple Choice

Which of the following do not have exactly 4 factors​

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15, 4, 6, 8, 10

• 15

• 4

• 6

• 8

• 10

Multiple Choice

Which of the following numbers has the most factors?​

​

15, 20, 9, 4, 1

• 15

• 20

• 9

• 4

• 1

Multiple Choice

Which of the following has the least number of factors?​

​

15, 20, 9, 4, 1

• 15

• 20

• 9

• 4

• 1

Multiple Choice

Which are the common factors of 12 and 15?

• 1, 3, 5

• 1, 3, 4

• 180

• 60

Fill in the Blank

How many factors does a prime number have?

Fill in the Blank

Is 12 a prime number?

Fill in the Blank

Is 3 a prime number?

Fill in the Blank

Which of these numbers are prime?​

10, 1, 6, 5, 9, 7, 11

Open Ended

Is 20 a prime number? Explain your answer.

Fill in the Blank

Find the first even number that is a multiple of 5 and 7.

Fill in the Blank

Joseph is thinking of a number. It is less than 10 and has exactly 3 factors. Find the two possible numbers that Joseph could be thinking of.

Multiple Choice

what is the smallest prime number?

• 1

• 0

• 2

• 3

Fill in the Blank

Mary has 26 sweets and is able to share them evenly between her friends. Mary has more than 1 friend. Write down how many friends Mary might have.

Open Ended

21 25 30 45 Which number is the odd one out? why?

Open Ended

15 24 28 33 Which number is the odd one out? why?

​Well done you have completed the lesson :)

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​Bring any questions you couldn't answer to class