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Maths > Properties Of Numbers > Flashcards

Properties Of Numbers Flashcards

1
Q

Find the one number in each line which is prime

18, 19, 20, 21

A

19

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2
Q

Find the one number in each line which is prime

8, 9, 10, 11, 12

A

11

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3
Q

Find the one number in each line which is prime

36, 37, 38, 39, 40

A

37

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4
Q

Find the two numbers in each line which are prime

14, 17, 21, 27, 29, 39

A

29, 17

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5
Q

Find the two numbers in each line which are prime

41, 45, 49, 51, 63, 67

A

41, 67

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6
Q

Find the two numbers in each line which are prime

2, 57, 71, 81, 91, 93

A

2, 71

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7
Q

How many prime numbers are there between 1 and 100?

A

25

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8
Q

What is two prime numbers that add to another prime number?

A

2+3 = 5

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9
Q

What are all the factors of this number?

6

A

1,6,2,3

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10
Q

What are all the factors of this number?

4

A

2,1,4

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11
Q

What are all the factors of this number?

18

A

1, 18, 2, 9, 3, 6

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12
Q

What are all the factors of this number?

60

A

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

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13
Q

What are all the factors of this number?

36

A

1, 36, 2, 18, 3, 12, 4, 9, 6

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14
Q

What are the first four multiples of

3

A

3, 6, 9, 12

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15
Q

What are the first four multiples of

9

A

9, 18, 27, 36

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16
Q

What are the first four multiples of

20

A

20, 40, 60, 80

17
Q

25, 30, 35, and 60 are all the multiples of ?

A

5

18
Q

Which one is wrong

Multiples of 6: 18, 24, 32, 48, 54

A

32

19
Q

Which one is wrong

Multiples of 11: 33, 77, 101, 132

A

101

20
Q

Which one is wrong

Multiples of 10: 5, 10, 20, 30, 60

A

5

21
Q

Write either multiple or factor in the space

15 is a ? of 5

A

Multiple

22
Q

Write either multiple or factor in the space

8 is a ? Of 32

A

Factor

23
Q

Write either multiple or factor in the space

9 is a ? Of 90

A

Factor

Maths (7 decks)

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