64 in Roman numerals
64 is written LXIV. In chunks: L (50) + X (10) + IV (4) = 64.
The answer
LXIV
64 in Roman numerals is LXIV.
How LXIV is built
To write it, split 64 into 60 + 4. 60 is LX, 4 is IV, so 64 is LX then IV: LXIV.
To read it, LXIV has 3 chunks, and IV is a take-away pair, worked out first and then added.
| Chunk | Worth | Why |
|---|---|---|
| L | 50 | Add |
| X | 10 | Add |
| IV | 4 | I before V: take away |
The mistake to watch for
Writing 64 as LXIIII
Wrong: LXIIII
LXIIII writes I four times in a row. Never more than three: 4 is IV, one before five, which makes 64 LXIV.
Check it with the converter
Type LXIIII to see why LXIIII is not 64. The rule numbers it gives are the three rules on the Roman numerals page.
Converter set to LXIV (64).
Keep going
Questions parents ask
What is 64 in Roman numerals?
64 is LXIV.
What comes before and after LXIV?
63 is LXIII and 65 is LXV.
Does LXIV use subtraction?
Yes, once: I comes before the bigger V, so IV is 4. The other letters are added.
What is the biggest letter in LXIV?
L, which is 50. LXIV has 4 letters.
Careful reading is an 11+ skill
Reading all 4 letters of LXIV in order is the careful checking 11+ papers reward. The free diagnostic covers all four subjects, with no card needed.