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The numbers‎ > ‎

One half

Some mathematical operations whose result is :

 
 
 
Using all the digits from  to :
 
 
Using the same number twice but changing the position of one digit:
 
 
(numbers with such properties are called parasitic numbers).
 
The Romans could also transcribe fractions; they used the S (semis) to write . Thus, the number represented by SIV was , because I represented  and V represented  and the operation was .