Doubler
▶ Play nowSame machines, different order, different answer — get the number out the other end.
Doubler is a number-machine puzzle. A number goes in one end of a conveyor and comes out the other. You are given exactly the machines you need, from Double, Add One and Halve, and every one must be used. The puzzle is never which machines, only the order to put them in to reach the target.
How to play
Send the number through every machine. The order changes what comes out!
Controls
| Play | Doubler — put the machines in the right order |
|---|---|
| Undo | Take back the last move (Z) |
| Show me | A free hint, as often as you like (H) |
| Again | Start this level over (R) |
| M | Sound on or off |
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