A hard math riddle
Which number, written in English, has all its letters in alphabetical order?
💡 Need a hint?
It is between 30 and 50.
Show the answer
Forty
Also accepted: 40.
Think it through before you peek. Stuck? Read the riddle out loud: many riddles hide the answer in a word with two meanings.
3 more riddles like this
- If a hen and a half lays an egg and a half in a day and a half, how many eggs does one hen lay in one day? See the answer →
- Which three different positive whole numbers give the same answer when you add them as when you multiply them? See the answer →
- There are 3 apples on a table. You take 2, then put 1 back. How many apples are on the table now? See the answer →
Frequently asked questions
What is the answer to the riddle "Which number, written in English, has all its letters in alphabetical order?"
The answer is Forty. It is between 30 and 50.
Is this riddle hard?
It is rated hard. Many adults need the hint, so do not worry if it takes a while.
Where can I find more riddles like this?
This riddle is in the math riddles and puzzles, logic puzzles, riddles for adults, and hard riddles lists on Quiz Zoomies, each with hints and hidden answers.
More riddle lists
Logic Puzzles
Logic puzzles with answers: reason it out, no special knowledge.Riddles for Adults
Riddles for adults: wordplay, logic and number tricks with answers.Hard Riddles
Hard riddles with hints and answers for riddle experts.All Riddles A to Z
Every riddle on its own page, with a hint, the answer and three more like it.
A new quiz every day on YouTube
Flags, capitals, trivia, riddles and brain teasers. Subscribe to Quiz Zoomies and test yourself with a new quiz video every day, plus Shorts in between.