Math for Parents

Tim Whiteford PhD 

Multiples and the

10 x 10 Square 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

 

Starting with multiples of 2 lightly shade in (or circle the number) each multiple with a colored pencil (e.g. 4, 6, 8, 10 ,12 etc).

 

Then do the same with multiples of 3, 4, 5, 6, 7, 8, 9, and 10 (and more) using a different colored pencil for each one.

 

Look for patterns as you go, horizontally, vertically and diagonally. Notice how one step to the right is adding 1 and one step down is adding 10.

 

All the numbers that are only shaded once will be the prime numbers