Factors and Multiples

​Prime numbers

​Definition :

A number that has 1 and the number

itself as factors.​

​

Example:

The factors of 7 are 1 and 7, therefore

7 is a prime number.​

A number that have factors other than 1 and the number itself​

​

The factors of 6 are 1, 2, 3 and 6.

Therefore 6 is a composite number.​

​Definition

​Composite number

Some text here about the topic of discussion

Multiple Choice

What is the definition of a factor?

• Numbers that are multiplied together to get a larger number

• Equal groups of a number, skip counting

Multiple Choice

When two numbers are multiplied then answer is called______

• factor

• multiple

• none

Multiple Choice

Which number is a factor of 10

• 3

• 4

• 5

• 8

Multiple Choice

Find the HCF of 12 and 15 ?

• 2
• 2 x 3
• 3
• 60

Multiple Choice

What does HCF stand for?

• Highest common factor

• Highest core frequency

• Highest common frequency

• Highest core factor

Multiple Choice

What does LCM stand for?

• lowest common number

• lowest core number

• lowest core multiple

• lowest common multiple

Multiple Choice

Which answer lists all the factors for 40?

• 1,2,4,5,8,12,14,40

• 1,2,3,4,5,8,10

• 1,2,4,5,8,10,20,40

• 1,2,4,5,6,7,8,9,10

Multiple Select

Write 36 as the product of its prime factors...

• 2 x 2 x 3 x 3

• 2 x 2 x 2 x 3

• 2² x 3²

• 2² x 3

Multiple Choice

Find the HCF of 30 and 36

• 2
• 3
• 4
• 6

Multiple Choice

What are the next three multiples? 6, 12, 18, ___ ,___ ,___

• 24, 30, 34

• 24, 36, 42

• 24, 30, 36

• 22, 28, 34

Multiple Choice

Find the LCM of 6 and 9...

• 18

• 30

• 24

• 36

Multiple Choice

A carpenter got given some free wooden planks. Some are 12m long and some are 18m long. She wants to cut them up so that she has equal size planks to make using them easier. What size planks should she cut them into to avoid wasting any wood?

• HCF

• LCM

Multiple Choice

What is a factor?

• a number or quantity that when multiplied with another produces a given number or expression.

• a number that can be divided by another number without a remainder.

• A Number

• A number experssiona to solve a multiplication problem

  SHOW ANSWER

Multiple Choice

17 is a PRIME NUMBER because it has just ___ factors: ___ and ___.

• 2, 5, 7

• two, itself, 1

• 2, 15, 2

• 2, 8.5, 2

Multiple Choice

Which of these statements is true?

• All numbers have 4 factors.

• 2 is a factor of every number.

• 1 is a factor of every number.

• All odd numbers have an odd number of factors.

Multiple Choice

Find the HCF for 18, 36, and 81

• 3

• 2

• 6

• 9

Multiple Choice

if a number is divisible by 3 and 7 by which other number will it also be divisible?

• 3

• 7

• 10

• 21

Multiple Choice

List the first 5 multiples of 3

• 3, 6 10, 15, 20
• 1, 3
• 3, 6, 9, 12, 15
• 6, 9, 12, 15, 18

Multiple Choice

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Multiple Choice

Numbers that you multiply to get another number are ______________ of the product.

• Multiples

• Prime

• Factors

• Times

Multiple Choice

what are the first 5 prime numbers in ascending order?

• 2,3,4,5,11

• 1,2,3,5,11

• 2,3,5,7,11

• 2,3,11,7,5

Multiple Choice

Name the 5th prime number.

• 2

• 11

• 5

• 7

Multiple Choice

Which is the only prime number that is even?

• 14

• 22

• 17

• 2

Multiple Choice

Which are factor pairs of 45?

• 1,45,5,9

• 1,3,7,9

• 5,7,8,9

• 7,9,5,2

Multiple Choice

When a Number exactly divides other number then that number is ________of original number.

• Multiple

• factor

• none

Multiple Choice

Every number has 2 factors

• 4 and 5

• 6 and 7

• 1 and number itself

• none

Multiple Choice

______is factor of every Number

• 0

• 8

• 9

• 1

Multiple Choice

Odd Numbers are not divisible by _____?

• 1

• 0

• 2

• 6

Multiple Choice

Which is smallest prime Number?

• 1

• 2

• 3

• 4

Multiple Choice

The factors of 12 are?

• 1,2,3,4,6 and 10

• 1,2,3,4,6 and 12

• none

Multiple Choice

The prime Numbers are ____factors?

• three

• four

• two

• one

Multiple Choice

Numbers which are divisible by 2 are called?

• even Numbers

• odd numbers

Open Ended

Find factors of 48 using factor tree?

Open Ended

Find first 7 multiples of 12?

Open Ended

Find the factors of following Numbers using Prime factorization method a) 90 b) 78

Open Ended

Find the common factors of 42 and 70

Multiple Choice

What is the definition of a multiple?

• Numbers that are multiplied together to get a larger number

• Equal groups of a number, skip counting

Multiple Choice

True or False: Factors of a number are always less than or equal to the main number

• True

• False

Multiple Choice

True or False: Multiples will start with the number and then get larger

• True

• False

Multiple Choice

1 and the number will always be a factor pair (ex: 1 x 24 is always a factor pair for 24)

• True

• False

Multiple Choice

Peter wrote 4 sets of numbers. Which set shows only multiples of 6?

• 6, 12,18,24
• 6, 16, 26, 36
• 1, 2, 3, 6
• 6, 40, 66, 500

Multiple Choice

Which lists all the factors of 25?

• 1, 25
• 1, 10, 25
• 1, 25, 50
• 1, 5, 25

Multiple Choice

Which list shows the first 5 multiples of 12?

• 12, 24, 36, 48, 60
• 1, 2, 3, 4, 6

Multiple Choice

Which list shows the factors of 18?

• 18, 36, 54, 72, 90
• 1, 2, 3, 6, 9, 18

Multiple Choice

What are the next three multiples?6, 12, 18, ___ ,___ ,___

• 24, 30, 34
• 24, 36, 42
• 24, 30, 36
• 22, 28, 34

Multiple Choice

Which number is NOT a factor for 30?

• 15
• 2
• 5
• 7

Multiple Choice

14, 49, and 28 are all multiples of what number?

• 2
• 7
• 4
• 5

Multiple Choice

Factors are the numbers you multiply together to get another number (product)

• True

• False

Multiple Choice

Which number is NOT a multiple of 9?

• 9

• 20

• 18

• 45

Multiple Choice

List all the factors of 15.

• 1, 2, 3, 4

• 1, 3, 5, 7, 15

• 1, 3, 5, 15

• 1, 15

Multiple Choice

Peter wrote 4 sets of numbers. Which set shows only multiples of 6?

• 6, 12,18,24
• 6, 16, 26, 36
• 1, 2, 3, 6
• 6, 40, 66, 500

Multiple Choice

These factors are for which number? 1, 3, 5, 15

• 15
• 5
• 3
• 25

Multiple Choice

Which of the following are a factor pair of 18?

• 2, 6

• 3, 9

• 3, 6

• 2, 8

Multiple Choice

List the first 5 multiples of 8

• 1, 2, 4, 8
• 8, 16, 25, 32, 40
• 8, 16, 24, 32, 40
• 8, 16, 24, 31, 40

Multiple Choice

Which number is a factor of 42?

• 5

• 10

• 9

• 7

Multiple Select

Which of the following are factors of 36? Check all that apply

• 9

• 6

• 8

• 2

Multiple Choice

12, 16, 24, 32, and 40 are multiples of ___

• 3

• 4

• 8