The sacred numbers are 2, 3, 5 and 7 plus multiples thereof. In addition, 13 is an unlucky number.
To Number 2
To Number 3
To Number 4
To Number 5
To Number 6
To Number 7
To Number 8
To Number 9
To Number 10
To Number 12
To Number 13
To Number 14
To Number 15
To Number 20
To Number 21
To Number 33
To Number 40
To Number 90
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