because of the trade between countries
Numeral
Their number system was based on 20 instead of 10. Their number system was based on three characters instead of 10 characters.
the way they represent one is a line (|)...
One of them is the Roman numeral system because it wasn't needed
MercuryVenusEarthMarsJupiterSaturnUranusNeptune
It is zero because it's not needed in the Roman numeral system.
The Roman numeral system does not use a zero because it's not needed.
new scientific evidence emerges that challenges the existing system or if there is a widespread consensus among experts in the field that a change is needed to better reflect the relationships between organisms.
The roman empire dedided that they needed a number system
It lacked a zero symbol which was not needed
The scn is an ever-increasing number. It can be used to determine the "age" of the database and its component datafiles.The current system SCN can be queried using dbms_flashback.get_system_change_number.The SCN of the last checkpoint can be found in v$database.checkpoint_change#.The SCN is needed in a flashback table .. to scn ... statement.Within this context, SCN stands for System Change Number.
A nought figure is not needed in the Roman numeral system because the positional place value of these numerals are self evident. A nought figure is needed in the Arabic numeral system (the numbers we use today) to identify the positional place value of these numerals.