youcubed: Marbles in a Box
Here’s one of our favorite challenges! This is a three-dimensional version of tic-tac-toe which is called “noughts and crosses” in Great Britain.



The NRICH website publishes free mathematics resources designed to challenge, engage and develop the mathematical thinking of students aged 5 to 19. NRICH also offers support for teachers by publishing Teachers’ Resources for use in the classroom.

This task can be found at:

Data, Graphing & Statistics, Probability
K-6, Middle School, High School

What are you looking for?


youcubed (Stanford University)

Website URL

Type of Resource

PDF File

Assigned Categories

Description of PDF

Click here for a poster of this problem.