Math · Number Theory
Factors, Multiples, Prime and Composite
Find factor pairs and multiples and sort numbers up to 100 into prime and composite.
- 🎓 Grade 4
- 🧮 Math
- 📐 4.OA.B.4
- ❓ 19 questions
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Which number is a factor of 63?
- A 5
- B 9
- C 11
- D 4
63 ÷ 9 = 7
Which list shows all the factor pairs of 20?
- A 1 × 20, 2 × 10
- B 2 × 10, 4 × 5
- C 1 × 20, 2 × 10, 3 × 7
- D 1 × 20, 2 × 10, 4 × 5
Which number is a multiple of 9?
- A 71
- B 61
- C 64
- D 63
9 × 7 = 63
Which number is a multiple of 7?
- A 48
- B 42
- C 43
- D 40
7 × 6 = 42
Which number is a factor of 24?
- A 5
- B 10
- C 9
- D 4
24 ÷ 4 = 6
1 is a prime number.
False 1 has only one factor, so it is neither prime nor composite.
Which number is a factor of 56?
- A 6
- B 8
- C 5
- D 12
56 ÷ 8 = 7
Which number is composite?
- A 7
- B 15
- C 11
- D 13
15 has more than two factors.
Every even number greater than 2 is composite.
True It has 2 as a factor, plus 1 and itself.
Which number is a factor of 45?
- A 10
- B 3
- C 8
- D 4
45 ÷ 3 = 15
Which number is prime?
- A 29
- B 27
- C 33
- D 21
29 has exactly two factors: 1 and 29.
Which number is a factor of 36?
- A 11
- B 7
- C 12
- D 5
36 ÷ 12 = 3
Which number is a multiple of 6?
- A 48
- B 53
- C 49
- D 46
6 × 8 = 48
Which number is a multiple of 8?
- A 47
- B 41
- C 40
- D 38
8 × 5 = 40
How many factors does 12 have?
- A 5
- B 6
- C 4
- D 7
Factors of 12: 1, 2, 3, 4, 6, 12.
How many factors does 16 have?
- A 3
- B 6
- C 4
- D 5
Factors of 16: 1, 2, 4, 8, 16.
Which number is a factor of 28?
- A 7
- B 12
- C 9
- D 5
28 ÷ 7 = 4
Which number is a factor of 40?
- A 9
- B 12
- C 10
- D 6
40 ÷ 10 = 4
How many factors does 18 have?
- A 7
- B 4
- C 5
- D 6
Factors of 18: 1, 2, 3, 6, 9, 18.
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