Practice identifying multiples, factors, and prime numbers using clear number patterns and simple reasoning.
Read each problem carefully. Show your work in the space provided.
Finding patterns in numbers
Math - Grade 4-5
- 1
List the first 5 multiples of 4.
- 2
List all the factors of 12.
- 3
Tell whether 17 is prime or composite. Explain how you know.
- 4
Write the first 6 multiples of 7.
- 5
Find all the factor pairs of 18.
- 6
Circle all the prime numbers: 9, 11, 13, 15, 19.
- 7
Find the greatest common factor of 8 and 12.
- 8
Find the least common multiple of 3 and 5.
- 9
Is 21 a multiple of 3, a factor of 42, or both? Explain.
- 10
List all the factors of 20.
- 11
Write the first 4 common multiples of 2 and 3.
- 12
Tell whether 1 is prime, composite, or neither. Explain your thinking.
- 13
Find the missing number: 5, 10, 15, __, 25. Tell what pattern you used.
- 14
Find the greatest common factor of 15 and 25.
- 15
A number has exactly 2 factors, 1 and itself. What kind of number is it? Give one example.