Numeral most commonly

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Let us know which are the numeral most commonly used.

Some numerals in common use are given below:

Indian numerals - Most of the positional base 10 numeral systems in the world have originated from India, which first developed the concept of positional numerology. The Indian numeral system is commonly referred to in the West as the Hindu-Arabic numeral system or even Arabic numerals, since it reached Europe

Hindu -Arabic numerals	1	2	3	4	5	6	7	8	9	10
Roman numerals	I	II	III	IV	V	VI	VII	VIII	IX	X

Numerical prefix - Numerical prefixes are prefixes usually derived from the words for numbers in various languages, most commonly Greek and Latin, although this is not always the case. Because of the common inheritance of Greek and Latin roots across the Romance languages, the import of much of that derived vocabulary

Rules of Writing Roman Number

Some rules are used in Roman number numeral system, these rules are explaining below:

(1) Multiplication Rule: If a symbol is repeated in succession, the value of the numeral is obtained by multiplying the value of the symbol by the number of times is repeated. No symbol is repeated more than three times.

Examples:

II = 1x 2 = 2

111 = 1 x 3 = 3

XX = 10 x 2 = 20

XXX = 10x3 = 30

CCC = 100x 3 =300

(2) Addition Rule: When a smaller number is written on the right of a bigger number, the smaller number is added to the bigger number.

Examples: V111 = 5 + 1 + 1+1 = 8

XX11 = 10 + 10 + 1 + 1 = 23

CX X = 100 +10 + 10 = 120

(3) Subtraction Rule: When a smaller number is written on the left of the bigger number the smaller number is subtracted from the bigger number.

Examples: 1V = 5 - 1 = 4

CM = 1000 -100 =900

XL = 50 -10 = 40

XXC = 100 – 20 = 80

Important points for writing Roman numeral number system:

(a)The symbol 1 can be subtracted only from V and X.

(b) V, L, D are never subtracted.

(c)The symbol X can be subtracted only from L and C.

(d)The symbol C can be subtracted D and M once only.

(e)There is another symbol ___ called bar. It is placed over a numeral which is multiplied by1, 000.

In our next blog we shall learn about "balancing equations calculator"

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