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Fractions
Math
Grade 4 Math
Grade 5 Math

 

Name _____________________________
Date ___________________
Number Theory
Complete.
1.   Circle all of the numbers that are divisible by 6.
187912432221
7278247636
2.   Circle all of the numbers that are divisible by 7.
669875493524
803321841646

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.
3.         96,811
by 3  ________
by 4  ________
by 6  ________
by 8  ________
by 10  ________
4.         480
by 2  ________
by 6  ________
by 7  ________
by 8  ________
by 10  ________
5.         57
by 2  ________
by 3  ________
by 4  ________
by 6  ________
by 10  ________
6.         1,780
by 6  ________
by 7  ________
by 8  ________
by 10  ________
by 12  ________

Classify each number as prime or composite.
7.         47
Prime
Composite
8.         12
Prime
Composite
9.         14
Prime
Composite
10.         65
Prime
Composite
11.         74
Prime
Composite
12.         41
Prime
Composite
13.         30
Prime
Composite
14.         61
Prime
Composite

Use the clue to fill in the missing digit.
15.   The number 81 is divisible by 3.
16.   The number 28 is divisible by 8.
17.   The number 8 is divisible by 2.
18.   The number 216 is divisible by 4.
19.   The number 54 is divisible by 6.
20.   The number 18 is divisible by 9.
21.   The number 30 is divisible by 5.
22.   The number 376 is divisible by 7.

 

Key #2
Complete.
23.   Circle all of the numbers that are multiples of 2.
98411216751
102153358669
24.   Circle all of the numbers that are multiples of 3.
227991111
402186553314

List 3 multiples of each number.
25.  
5





26.  
86





27.  
79





28.  
37





29.  
14





30.  
91






Fill in the missing multiple.
31.  
______, 54, 63, 72, 81
32.  
34, 51, ______, 85, 102
33.  
56, 70, 84, ______, 112
34.  
60, ______, 80, 90, 100
35.  
42, 48, 54, ______, 66
36.  
9, ______, 15, 18, 21

List all of the factors of each number.
37.   46

38.   19

39.   80

40.   40

41.   56

42.   62

43.   32

44.   15

45.   37

46.   58

47.   48

48.   10


 

Key #2
Find the prime factorization of each number.
49.   10

50.   12

51.   96

52.   94

53.   61

54.   88

55.   22

56.   58

57.   19

58.   90

59.   97

60.   25


Find the greatest common factor of each set of numbers.
61.   14 and 72

62.   42 and 68

63.   63, 18, and 72

64.   41 and 79

65.   60 and 12

66.   20, 40, and 72

67.   41 and 61

68.   42 and 28

69.   64 and 96


Find the least common multiple.
70.   8 and 12

71.   3 and 14

72.   6, 8, and 16

73.   15 and 18

74.   16 and 20

75.   6 and 18

76.   4, 13, and 16

77.   5 and 11

78.   2, 5, and 9


Complete.
79.   Identify a number that is divisible by 3 and 19, which is not divisible by 8, 4, 14, 10, and 7. Describe how you found the number.

80.   When you divide two even integers, is it possible to get a remainder other than 0? Explain and make up an example problem.


 


Answer Key


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Fractions
Math
Grade 4 Math
Grade 5 Math