What are Roman Numbers?

One of the early systems of writing numerals is the system of Roman Numbers. This system is still used in many places. For example, we can see the use of Roman numerals in clocks; it is also used for classes in the school time table etc.

Roman Numbers were developed so that the Romans could easily price different goods and services. These Numbers were widely used throughout the Roman Empire in everyday life.
The symbol for one in the this system probably represented a single tally mark which people would notch into wood or dirt to keep track of items or events they were counting.
It would also be easy to write on a wax tablet.

Use of 7 letters of Roman Numbers

The Roman Numbers from 1 to 10 are generally written as:

I, II, III, IV, V, VI, VII, VIII, IX, X.

The Roman Numbers as multiples of 100 are written as:

C = 100,

CC = 200,

CCC = 300,

CD = 400,

D = 500,

DC = 600,

DCC = 700,

DCCC = 800,

CM = 900,

M = 1000,

Since the system has no standard symbols for 5,000 and 10,000, the full pattern cannot be extended to the multiples of 1000 – restricting the "thousands" range of "normal".
Roman Numbers for thousand ,two thousand and three thousand are

M=1,000,

MM=2,000,

MMM=3,000