In mathematics, roman numerals are defined as a numeral system in which numbers are represented by distinct letter combinations. I, II, III, IV, V, VI, VII, VIII, IX, and X are the most regularly used roman numbers from 1 to 10. IV represents the number four, and IX represents the number nine in these notations. In this context, IV can be understood as “one less than 5” and IX as “one less than 10.”

Instead of using place value notation, roman numerals employ the base ten system or decimal system. The Arabic numeral will be represented by a mix of several symbols. The Roman numbers are all from the English alphabet. However, not all English alphabets use Roman numerals.

Here, we are going to discuss “XXVII and XXIX Roman Numeral” in detail with their definition, conversion, and many examples.

## XXVII Roman Numerals

XXVII Roman Numerals can be expressed as numbers by adding the roman numerals that have been changed, i.e. XXVII = XX + VII = 20 + 7 = 27. The accurate translation of XXVII Roman Numerals results from the higher roman numerals coming before the lower ones. Let’s learn how to convert XXIX Roman numerals into the correct number translation.

### How to Convert XXVII Roman Numerals into its Numerical Value?

Any of the two methods shown below can be used to get the numerical value of XXVII Roman Numerals:

Method 1: We divide the roman numerals into single letters, write the numerical value of each letter, and add/subtract them in this technique.

XXVII

⇒X + X + V + I + I

⇒10 + 10 + 5 + 1 + 1

⇒27

Method 2: We consider groups of roman numerals for addition or subtraction in this method, such as,

XXVII

⇒ XX + VII

⇒20 + 7

⇒ 27

Therefore, we get the numerical value of XXVII roman numerals as 27.

## XXIX Roman Numerals

XXIX Roman Numerals can be expressed as numbers by adding the transformed roman numerals, i.e. XXIX = XX + IX = 20 + 9 = 29. The higher roman numerals come before the lower numbers, resulting in a correct numerical value of XXIX Roman Numerals. Let’s learn how to convert XXIX Roman numerals into its correct numerical value.

### How to Convert XXIX Roman Numerals into its Numerical Value?

To obtain the numerical value of XXIX Roman Numerals, use any of the two methods provided below:

Method 1: In this method, we divide the roman numerals into single letters, write the numerical value of each letter, and then add/subtract them.

XXIX

⇒ X + X + (X – I)

⇒10 + 10 + (10 – 1)

⇒29

Method 2: In this method, we consider groups of roman numerals for addition and subtraction, such as,

XXIX = XX + IX = 20 + 9 = 29

As a result, we get the numerical value of XXVIII roman numeral as 29.

## Rules to Write Roman Numerals

When expressing a number in roman numerals, certain rules mentioned below must be followed.

• The symbol’s value is multiplied by the number of times it is repeated. (Eg. II – 2, XXX – 30 and XXXX – 40).
• A symbol can only be repeated three times, for example, XXX = 30, CC = 200, and so on.
• Symbols V, L, and D never reappear.
• When a symbol with a lower value appears after a symbol with a higher value, the values of the two symbols are added.  For Example-  XI = X + I = 10 + 1 = 11.
• When a symbol of a lower value appears before a symbol of a higher value, it is deducted. For Example-  IV = V – I = 5 – 1 = 4.
• Because they are not placed before a bigger value symbol, the symbols V, L, and D are never subtracted.
• The symbol I can only be subtracted from symbols V and X, while symbol X can only be subtracted from symbols L, M, and C.