Question

Express 19 in roman numeral.

Answer 1

Hint: We need to recall the roman representation of the numbers for all the digits till 10. Then using those representations we can represent the given number accordingly.

Complete step-by-step answer:

Roman numerals are a numeral system that originated in ancient Rome. Numbers in this system are represented by a combination of letters from the Latin alphabet.
Let us first look at the Roman numerals:
1 - |
2 - ||
3 - |||
4 - |V
5 - V
6 - V|
7 - V||
8 - V|||
9 - |X
10 - X
Now, we are asked the question about the roman numeral representation of 19.
Here, 19 can be expressed as the summation of 10 and 9.
Now, while representing 19 we use the roman numerals of both 10 and 9.
As 19 can be said as 10 followed by 9.
Thus, we can represent it as X|X.

Note: It is important to note that an | In the wrong place can be the difference between 9 and 11 or 99 and 101.
If smaller numbers follow lager numbers, add the numbers.
For example in the roman numeral X||, you add 10, 1 and 1 which makes 12.
If a smaller number precedes a larger number, subtract the smaller number.
For example in the roman numeral |V, you subtract 1 from 5 which makes it 4.
The roman numeral representation of 1, 5, 10 when combined in various forms create new numbers. Their placement is important, as the same letters can create an entirely new number when in a different order.