Dozenal

Dozenal is a daily math puzzle where your mission is to fill the board with number chains that each equal 12.

The twist is in the gaps. The space between numbers determines whether you add, subtract, or multiply them. You need to use every number and every empty space, so finding a twelve is only part of the puzzle. Your chains also have to fit together.

How it works:

• Connect numbers to build chains that finish at 12.
• No empty spaces between numbers means add.
• One empty space means subtract.
• Two empty spaces means multiply.
• You can repeat an operation along a chain. Switching to a different operation ends that chain immediately, so the switch must bring you to 12.
• Use every number and gap to complete the board.
• Tap a chain to undo its last step, or tap its first tile to clear the whole chain.

Why we like it:

• ✅Simple arithmetic meets clever path planning.
• ✅Empty spaces are just as important as the numbers.
• ✅Finding twelve feels even better when everything fits.

Hint: Direction matters. A chain that works from one end may fail from the other, especially when switching operations. Plan that final switch before building the rest.