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NumberBuilder

Roll. Solve. Repeat. A math puzzle solver and challenge for
dice-and-math games.

VERSION 2.0 · NEW
For students, parents & teachers
Solve mode free · Challenge free to try
NumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshot
WHAT'S NEW · VERSION 2.0

Rebuilt, and a lot more fun.

Version 2.0 brings a fresh new icon and design, a real challenge to test your skills, and six levels of difficulty.

Challenge Mode
Don't just get the answer — solve it yourself. Challenge Mode tests whether you can build the equation on your own.
Six Levels
From basic arithmetic to exponents and roots — six levels of difficulty to match any player.
Modern Design
A cleaner, more focused interface throughout the app.
Track Your Growth
Watch your skills level up over time as you take on harder challenges.
What it is

Never get stuck on a number again.

Stuck creating an equation while playing a dice-and-math game like Number Knockout? Enter your dice roll and the number you're trying to reach, and NumberBuilder calculates every possible solution — using addition, subtraction, multiplication, division, powers, and roots.

New in version 2.0: switch to Challenge Mode to test your own skills instead of just getting the answer, and pick from six levels of difficulty. Super handy for teachers and parents helping kids who are stuck. Note: this is a solver and practice tool, not the game itself, and is not affiliated with National Number Knockout or Classical Conversations.

How it helps
Enter your dice roll and a target number to instantly find every valid solution.
New: Challenge Mode lets you build the equation yourself and checks your work.
Six levels of difficulty, from basic arithmetic to exponents and roots.
Perfect for the 6×6 grid of Number Knockout (also known as Board Slam).
Solve mode is free. Challenge mode is free to try, then $1.99 to unlock.
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