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ONE GRID. ONE LITTLE DIFFERENCE.

Letter and number odd one out game

A circle with a little tail. A line that stops short. Familiar letters and numbers become visual puzzles: find the shape that looks different, without spelling a word or doing a sum.

  • 68 levels
  • 2 chapters
  • 3×3 to 10×10
Play Letter play

Free in your browser. No sign-up needed.

A little preview. Can you see the difference?
Show the difference

One shape has a short diagonal tail at the lower right.

YOUR NEXT DISCOVERY

Choose your chapter

Start fresh or pick up your saved progress. Completed chapters stay available to replay.

Letter play

32 levels · 8 grid sizes

Explore curves, crossbars and gaps in a collection of letter and number shapes.

Play Letter play

Letters & numbers

36 levels · 8 grid sizes

Familiar letters and numbers with small visual changes. No spelling or arithmetic required.

Play Letters & numbers

THE LITTLE THINGS

Follow the strokes, not the meaning

These puzzles use the outlines, curves and gaps in familiar symbols. A crossbar can be missing, a curve can become a corner, or a loop can open. You do not need to name the symbol to solve the grid. Look for the one drawing that does not match the repeated shape around it.

A way to look

Trace the shape in a consistent order: top, middle, then bottom. Comparing the empty space inside a letter can help you spot a changed stroke. When the grid gets dense, use Zoom in to keep the lines clear.

Rounded O shape
A little tail
H shape with a middle crossbar
Across the bridge
Number seven with a straight top stroke
A softer seven
Closed circular zero shape
An open circle

One small find, then another

  1. Find the one that is different

    Tap or click the drawing that does not match. Every puzzle has one answer. A wrong tap lets you keep looking.

  2. Find your pace

    Play without a time limit, or choose the optional 30-second timer. Complete a grid size to unlock the next; replay any size you have already opened.

  3. Keep your discoveries

    Every five newly completed levels across all themes earn a sticker. Finish a chapter for its badge. Guest progress stays in this browser; sign in to sync across devices.

Before you play

Is this a spelling or math game?

Neither. Letter play and Letters & numbers are about how symbols look. There are no words to unscramble, calculations to finish or language questions to answer. Each grid has one visually different symbol, just like the animal puzzles.

Can I play these puzzles on my phone?

Yes. Use a phone, tablet or desktop browser. Tap the different drawing on a touchscreen, or click with a mouse. Larger grids have a Zoom in option, and Hint can help when you are stuck.

Will I lose my progress if I switch themes?

No. Each chapter keeps its completed levels and unlocked grid sizes. Guest progress is saved in this browser. Sign in while online to sync it across devices; clearing browser data can remove a guest save.

A change of scenery

The same little discovery, in another world.