Free puzzle · ages 6+
Sliding Number Puzzle (15 Puzzle)
Slide the tiles into the empty space until every number is in order. Bigger boards at every level, from 3 × 3 to 9 × 9.
The “15 puzzle”, a craze in the USA in the 1870s.
- 6+ages
- 5levels
- 49,000challenges
- USAfrom
How to play
- The board has one empty space.
- Tap a tile next to the gap, or in its row or column, to slide it.
- Put the numbers back in order, left to right, top to bottom.
- Start with 3 × 3, then try 4 × 4 up to 9 × 9.
What your child learns
The classic sliding puzzle teaches planning: solving the top row first and not undoing it is a real strategy children discover for themselves.
- Planning ahead Think a few moves ahead before you move.
- Logical reasoning Solve one row at a time without undoing it.
- Persistence Try, check and change your mind.
- Number sense Put numbers in order, 1 to 15 and beyond.
Pick a level
Start easy, or jump straight to a challenge.
Ready to try Number Slide?
Free in the browser on phones, tablets and computers. No sign-up, no ads.
Questions parents ask
Is Number Slide free?
The first 3 Beginner challenges of Number Slide are free in the browser, with no sign-up and no ads. Family Pro unlocks every challenge at all five levels, the hint coach, solutions and saved progress. During early access, every level is open to try.
What age is Number Slide for?
Number Slide is recommended for ages 6+. Start on Beginner and move up a level whenever it feels easy.
What does Number Slide teach?
Planning ahead: Think a few moves ahead before you move. Logical reasoning: Solve one row at a time without undoing it. Persistence: Try, check and change your mind. Number sense: Put numbers in order, 1 to 15 and beyond.
Does it work on phones and tablets?
Yes. It plays in any modern browser on phones, tablets and computers, with touch or a mouse.
If your child likes Number Slide, try
