One Letter Changes Everything
1 / 15Change just one letter and a word takes on a completely different meaning! How well can you navigate these one-letter transformations?
15 quick questionsNo sign-upFree to playTap an answer below to begin ↓
Change one letter in 'cat' to make something you wear on your head. What's the new word?
About One Letter Changes Everything
Give your memory a workout with One Letter Changes Everything: 15 multiple-choice questions aimed at mixed difficulty, free to play right in your browser. Change just one letter and a word takes on a completely different meaning! How well can you navigate these one-letter transformations? Expect to spend about 7 minutes; every question comes with an explanation, so you learn something even when you miss.
A few sample questions
1. Change one letter in 'cat' to make something you wear on your head. What's the new word?
Answer: Hat
2. Which single letter change turns 'friend' into 'a cooking method'?
Answer: Fried
3. Change one letter in 'word' to get something sharp. What is it?
Answer: Cord
4. Change one letter in 'house' to make a small rodent. What do you get?
Answer: Mouse
5. Change one letter in 'anger' to make a source of peril. What's the word?
Answer: Danger
Frequently asked questions
Will I lose my progress if I close the page?
Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, One Letter Changes Everything fits comfortably in one sitting.
How many questions are in One Letter Changes Everything?
One Letter Changes Everything has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
Is One Letter Changes Everything free to play?
Yes. The entire SeniorBrainGames catalog — including One Letter Changes Everything — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does One Letter Changes Everything take?
Most players finish One Letter Changes Everything in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
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