Last modified on 4 February 2015, at 22:42

Factors and Multiples Game

Problem, Clue, Solution, Teachers' note

A game in which players take it in turns to choose a number. Can you block your opponent?

Teaching approach. This lesson idea is about thinking strategically(ta).

The collection of NRICH activities are designed to develop students capacity to work as a mathematician. Exploring, questioning, working systematically, visualising, conjecturing, explaining, generalising, justifying, proving are all at the heart of mathematical thinking.

This particular resource has been adapted from an original NRICH resource. NRICH promotes the learning of mathematics through problem solving. NRICH provides engaging problems, linked to the curriculum, with support for teachers in the classroom. Working on these problems will introduce students to key mathematical process skills. They offer students an opportunity to learn by exploring, noticing structure and discussing their insights, which in turn can lead to conjecturing, explaining, generalising, convincing and proof.

The Teachers’ Notes provided focus on the pedagogical implications of teaching a curriculum that aims to provoke mathematical thinking. They assume that teachers will aim to do for students only what they cannot yet do for themselves. As a teacher, consider how this particular lesson idea can provoke mathematical thinking. How can you support students' exploration? How can you support conjecturing, explaining, generalising, convincing and proof?. (edit)

Resource details
Title Factors and Multiples Game
Topic Number
Teaching approach
Learning Objectives

Thinking strategically

Age of students / grade

Related ORBIT Wiki Resources
Files and resources to view and download

The following parts are available: Problem, Clue, Solution, Teachers' note.

The original problem is available on the NRICH website here.


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.


CC-By, with kind permission from NRICH. This resource was adapted from an original NRICH resource.