Number circle
The number circle shows the cyclic structure of the natural numbers.
Explanation
In the middle is the 0, because it appears both in the unit circle as well as in the number circle. The inner border starts with 1, and continues till 24.
165 166 167 168 145 146 147 164 141 142 143 144 121 122 123 148 140 117 118 119 120 97 98 99 124 116 93 94 95 96 73 74 75 100 92 69 70 71 72 49 50 51 76 68 45 46 47 48 25 26 27 52 44 21 22 23 24 1 2 3 28 20 4 163 139 115 91 67 43 19 i1 5 29 53 77 101 125 149 162 138 114 90 66 42 18 i2 0 i0 6 30 54 78 102 126 150 161 137 113 89 65 41 17 i3 7 31 55 79 103 127 151 160 136 112 88 64 40 16 8 32 56 80 104 128 152 15 14 13 12 11 10 9 39 38 37 36 35 34 33 63 62 61 60 59 58 57 87 86 85 84 83 82 81 111 110 109 108 107 106 105 135 134 133 132 131 130 129 159 158 157 156 155 154 153
There are three types of natural numbers. You can see this in the inner border.
| • | There are 8 multiples of three. These are 3, 6, 9, 12, 15, 18, 21, 24. The number 3 is a prime number because the series starts with it. All further multiples of 3 are therefore no prime numbers. |
| • | There are 8 multiples of two. These are 2, 4, 8, 10, 14, 16, 20, 22. The number 2 is a prime number because the series starts with it. Because of this other even numbers are no prime numbers. |
| • | The other 8 numbers are 1, 5, 7, 11, 13, 17, 19, 23. These are all prime numbers, with the exception of the number 1. All multiples of these prime numbers are therefore no prime numbers. |
With the prime number cross you can show the prime numbers and clarify the influence they have on all numbers.