Question

Write the number $90$ as roman numeral.

Answer 1

Roman numerals:

Firstly we break the number 90 into the least expanded form.

So $90$$=100-10$

Now write the respective Roman numeral and add/subtract them.

Hence, 90 = 100 – 10 is written as C – X = XC

The letters are subtracted when a smaller letter comes before a larger letter.

Hence, 90 in Roman numerals is XC.