Too many notches | Group the marks | ABC of Mathematics

ABC of Mathematics

Fields

Programming & Computer Science 2 open
Mathematics 3 open

Try a lesson

Build an Interpreter Programming
Build Hangman Programming
Invent Counting Math
Invent Place Value Math
Invent Negative Numbers Math

Coming next

Build a Compiler Programming
Build a JavaScript Runtime Programming

Not sure where to begin? Start with Build an Interpreter or read how the lessons work

You logged in, out, or switched accounts in another tab. Changes on this page are not being saved.

See how many Two sets of pebbles Pebbles and glasses

Match them up One for one Shake them up

Carry the glasses with you Which ones did I do?Carry the stick

Group the marks Too many notches Cut them in fives

Loading...

ABC of …

© 2026 Debjit Biswas · debjitbiswas.com

Programming Math About Privacy Terms

May we use a cookie to count your repeat visits? It shows us which lessons work. No ads, no tracking across sites. Details