Widgetilities
Auto

NumberBuilder

A math puzzle solver for dice games like Number Knockout.

For students, parents & teachers
Free
NumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshotNumberBuilder screenshot
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.

Super handy for teachers and parents helping kids who are stuck. Note: this is a solver 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.
Uses each die once, with basic arithmetic plus powers and roots for advanced play.
Perfect for the 6×6 grid of Number Knockout (also known as Board Slam).
A great teaching aid for parents and teachers — and completely free.
Widgetilities

An independent app studio making useful, beautifully crafted apps for parents and educators.

Apps
ReadingTime
Lectios
NumberBuilder
Other Apps
Company
About
Privacy
App Store
Get in touch
info@widgetilities.com
© 2026 Widgetilities LLC Built & maintained by Micah Chollar