70 in Roman numerals

70 in Roman numerals is LXX.

Pick any whole number from 1 to 3,999.

70 = \text{LXX}

How to work it out

1
Take the biggest Roman value that fits, write its letter, subtract it, and repeat.
2
Here: 50 (L) + 10 (X) + 10 (X) = 70.
3
Joined together: LXX. (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.)

What is 70 in Roman numerals?

LXX.

How do you read LXX?

LXX = 50 + 10 + 10 = 70.