101 in Roman numerals

101 in Roman numerals is CI.

Pick any whole number from 1 to 3,999.

101 = \text{CI}

How to work it out

1
Take the biggest Roman value that fits, write its letter, subtract it, and repeat.
2
Here: 100 (C) + 1 (I) = 101.
3
Joined together: CI. (Four of the same letter in a row is never used: 4 is IV, 9 is IX, 40 is XL, 90 is XC, 400 is CD, 900 is CM.)

Value	Letters
100	C
1	I

What is 101 in Roman numerals?

CI.

How do you read CI?

CI = 100 + 1 = 101.