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Sum Forge

Hammer numbers together. Strike the target.

60 levels · free · no sign-up

Sum Forge

Pizookie Original · Puzzle

About Sum Forge

A numbers puzzle at the anvil. Forge two ingots with plus, minus, times or divide into a new number and hit the target. Gold ingots must be used, and later levels ask you to use every ingot.

math numbers arithmetic

Combine numbers to reach the target

Levels: 60, all proven solvable
Genre: Puzzle
Orientation: Portrait, fits any screen
Controls: Tap, click or drag
Last updated: October 24, 2026
Added: October 24, 2026

How to play Sum Forge

Rules

Tap an ingot, an operator, then another ingot. They forge into one new ingot: 6 × 7 makes 42.
Make the target shown on the plaque. Forged ingots glow and can be forged again.
Results stay whole and above zero: 9 ÷ 2 will not forge. Minus and divide take the bigger number first by themselves.

Controls

Tap an ingot again to put it down. Fewer forges earn more stars; par is the fewest possible.

Later on

The gold ingot (from level 10) must be part of the target you forge.
Use them all (from level 18): every ingot must go into the target.

Undo takes back a forge (3 per level). Hint shows a forge on a shortest route.

Your progress

Play a level and your stars and progress show up here. They are saved on this device, and on every device once you sign in.

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