Slide Numbers Together and Make Ten
10 is a sliding number puzzle built around a simple goal. Every group of movable numbers needs to become 10. You drag tiles across a board and combine their values until nothing useful remains outside the completed tens.
A numbered tile does not move one square at a time. It travels in the chosen direction until a wall, another tile or another obstacle stops it. This movement rule makes positioning important.
When two numbered tiles meet, their values add together. Moving a 3 into a 4 creates 7. That 7 can later join a 3 to create 10. Many levels contain several possible combinations, but only some of them leave enough room to finish the board.
Once a tile reaches 10, it becomes a solid block. You cannot move it again. The completed block stays exactly where you created it.
A Finished Ten Can Help or Hurt
Making 10 sounds like the obvious thing to do whenever the chance appears. That can cause problems.
A completed 10 takes up space. It may block another number from reaching the tile it needs. On the other hand, that same block may provide the stopping point needed to line up another move.
This turns 10 into more than an addition exercise. Players need to think about position, movement and order.
Larger numbers often need attention first because they have fewer useful partners. An 8 needs only 2 more to reach the target. Using that 2 somewhere else can leave the 8 trapped later.
The game also introduces more unusual layouts as you progress. New board features make the movement less predictable and force you to rethink the simple sliding rules.
Take Back Mistakes and Try Another Plan
10 does not rush you with a short timer. You can study the board before making the next move. An undo feature also lets you reverse a mistake and test another idea.
The browser version contains 55 levels. Early puzzles teach the main rules without throwing too many numbers at you. Later stages give you tighter spaces and combinations that need a clear plan.
The controls stay simple throughout the game. Drag a tile in the direction you want it to travel. The challenge comes from deciding which tile should move first.
10 turns basic addition into a thoughtful puzzle. Knowing that 6 plus 4 equals 10 is easy. Getting the 6 and 4 into the right positions without blocking the rest of the board can take much more thought.
That balance makes 10 useful for players who enjoy number games without wanting complicated calculations. The math stays clear while the movement provides the real challenge.