24 in Roman numerals
24 is written XXIV. In chunks: X (10) + X (10) + IV (4) = 24.
The answer
XXIV
24 in Roman numerals is XXIV.
How XXIV is built
To write it, split 24 into 20 + 4. 20 is XX, 4 is IV, so 24 is XX then IV: XXIV.
To read it, XXIV has 3 chunks, and IV is a take-away pair, worked out first and then added.
| Chunk | Worth | Why |
|---|---|---|
| X | 10 | Add |
| X | 10 | Add |
| IV | 4 | I before V: take away |
The mistake to watch for
Writing 24 as XXIIII
Wrong: XXIIII
XXIIII writes I four times in a row. Never more than three: 4 is IV, one before five, which makes 24 XXIV.
Check it with the converter
Type XXIIII to see why XXIIII is not 24. The rule numbers it gives are the three rules on the Roman numerals page.
Converter set to XXIV (24).
Keep going
Questions parents ask
What is 24 in Roman numerals?
24 is XXIV.
What comes before and after XXIV?
23 is XXIII and 25 is XXV.
Does XXIV 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 XXIV?
X, which is 10. XXIV has 4 letters.
Careful reading is an 11+ skill
Reading all 4 letters of XXIV in order is the careful checking 11+ papers reward. The free diagnostic covers all four subjects, with no card needed.