Probability: Remove One

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In this math lesson, learners are given 15 chips and a number line labeled from 2-12. They are instructed to place their 15 chips on the numbers which they think will represent the sums when two dice are rolled. The object of the game is to be the first person to remove all of the chips. A chip is removed if it is on a number that corresponds to the sum rolled. The game is analyzed and the concepts of probability, sample space and game winning strategies are discussed. Learners place chips on their number lines and play the game again to implement winning strategies.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
45 to 60 minutes

Estimated Materials Cost:
free per student

Age Range:
Ages 11 - 14

Resource Types:
Activity, Game, Lesson/Lesson Plan


Materials List (per student)


  • Mathematics
    • Data Analysis and Probability
      • Data Analysis
      • Data Collection
      • Data Representation
      • Probability
    • Number and Operations
  • The Nature of Technology
    • The Design Process
      • Problem Solving

Informal Categories

  • Games


To use this activity, learners need to:

  • see
  • read
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, PBS, 2012

Funding Source:

  • US Department of Education