Create a new printable
Answer key also includes questions
Answer key only gives the answers
No answer key
   Worksheets and No Prep Teaching Resources
Fractions
Math Worksheets

 

Sample - Click above to make a new math worksheet (PDF).
Name _____________________________
Date ___________________
Number Theory
Classify each number as prime or composite.
1.         46
Prime
Composite
2.         59
Prime
Composite
3.         8
Prime
Composite
4.   * This is a pre-made sheet.
Use the link at the top of the page for a printable page.
5.         3
Prime
Composite
6.         48
Prime
Composite
7.         67
Prime
Composite
8.         78
Prime
Composite

Complete each divisibility table. Write yes if the number is divisible by the given number. Write no if it is not divisible by the given number.
9.         504
by 2  ________
by 4  ________
by 5  ________
by 8  ________
by 9  ________
10.         70,301
by 3  ________
by 5  ________
by 7  ________
by 8  ________
by 10  ________
11.         634
by 3  ________
by 4  ________
by 5  ________
by 10  ________
by 12  ________
12.         34,530
by 4  ________
by 5  ________
by 7  ________
by 8  ________
by 9  ________

Use the clue to fill in the missing digit.
13.   The number 608 is divisible by 9.
14.   The number 8 is divisible by 14.
15.   The number 54 is divisible by 13.
16.   The number 18 is divisible by 6.
17.   The number 00 is divisible by 18.
18.   The number 256 is divisible by 16.
19.   The number 102 is divisible by 8.
20.   The number 1050 is divisible by 17.

List all of the factors of each number.
21.   43

22.   29

23.   78

24.   20

25.   17

26.   34

27.   47

28.   40

29.   49

30.   35

31.   68

32.   73


 

Key #2
aKey #2
Find the prime factorization of each number.
33.   24

34.   96

35.   25

36.   21

37.   28

38.   44

39.   37

40.   62

41.   86

42.   63

43.   78

44.   17


Find the greatest common factor of each set of numbers.
45.   57 and 36

46.   12 and 60

47.   53 and 43

48.   25, 20, and 65

49.   80 and 20

50.   31 and 88

51.   90 and 55

52.   90, 63, and 27

53.   71 and 39


Find the least common multiple.
54.   2 and 12

55.   7 and 12

56.   6, 10, and 12

57.   6 and 8

58.   4 and 6

59.   4, 8, and 32

60.   3 and 11

61.   3, 5, and 10

62.   3, 12, and 21


Complete.
63.   Use the digits 4, 5, and 0 to create a 3-digit number that is divisible by 2, 3, 4, 6, 7, 8, and 9. Describe how you found the number.

64.   The divisibility rules are helpful in math because they allow us to analyze division problems to arrive at a quick solution. The number 6 is divisible by both 2 and 3. How can you tell if a number is divisible by 6? Show by example a number that is divisible by 2, 3, and 6.


 


Answer Key


Sample
This is only a sample worksheet.

Create a new printable
Answer key also includes questions
Answer key only gives the answers
No answer key
   Worksheets and No Prep Teaching Resources
Fractions
Math Worksheets