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SHHS Maths - Foundation > Factors, Multiples and Prime Numbers > Flashcards

Factors, Multiples and Prime Numbers Flashcards

1
Q
A
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2
Q

What are the first five multiples of 6?

A

6, 12, 18, 24, 30

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3
Q

What are the multiples of 9 between 60 and 80?

A

63 and 72

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4
Q

What is the lowest common multiple (LCM) of 6 and 8?

A

24

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5
Q

What is the lowest common multiple (LCM) of 7 and 5?

A

35

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6
Q

What is the lowest common multiple (LCM) of 10 and 15?

A

30

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7
Q

Sausages come in packs of 20. Bread rolls come in packs of 15. Bethany has an equal number of sausages and bread rolls. How many of each does she have?

A

60

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8
Q

What are the factors of 6?

A

1, 2, 3, 6

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9
Q

What are the factors of 24?

A

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

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10
Q

What are the factors of 30?

A

1, 2, 3, 5, 6, 10, 15, 30

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11
Q

Give a factor of 16 that is not a factor of 12.

A

8 or 16

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12
Q

What is the highest common factor (HCF) of 12 and 18?

A

6

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13
Q

What is the highest common factor (HCF) of 24 and 20?

A

4

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14
Q

What is the highest common factor (HCF) of 60 and 45?

A

15

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15
Q

What is a prime number?

A

A number with exactly two factors: 1 and the number itself.

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16
Q

True or false:

1 is a prime number.

A

False

17
Q

What is the first prime number?

A

2

18
Q

What are the first ten prime numbers?

A

2, 3, 5, 7, 11, 13, 17, 19, 23, 29

19
Q

Give two different prime numbers that add to 14.

A

3 and 11

20
Q

Is 63 a prime number?

A

No

21
Q

Give all the prime numbers between 70 and 80.

A

71, 73 and 79.

22
Q

Write 60 as a product of its prime factors.

A

60 = 23 x 3 x 5

23
Q

Write 1960 as a product of its prime factors.

A

1960 = 23 x 5 x 72

24
Q

a) Write 180 and 84 as a product of their prime factors.
b) Find the LCM of 180 and 84.
c) Find the HCF of 180 and 84.

A

a) 180 = 22 x 32 x 5 and 84 = 22 x 3 x 7
b) LCM = 1260
c) HCF = 12

SHHS Maths - Foundation (10 decks)

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