One Player Game Fill the game board with the counters from both boxes. Avoid lining up four numbers with a common factor (other than one). A trophy is available for filling all the cells of the game board. |
Two Player Game Each player has a box of counters to choose from. Take it in turns to drop a counter into the game board. The winner is the first to line up four numbers with a common factor (other than one). |

Drag the counters into the area above the game board then release.

Here are examples of four numbers that have a common factor:

15,10,20,20 - Common factor 5

8,4,20,24 - Common factor 4

21,18,15,24 - Common factor 3

You can earn a Transum virtual trophy for completing the one-player challenge.

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

Transum,

Saturday, August 9, 2014

"I have seen too many students that, while understanding the algebraic concept of factorisation, can not easily spot the common numerical factors. Hopefully this game might help improve common factor spotting ability."

Jess, England

Monday, May 2, 2016

"Love your games."

Katy, Wales

Tuesday, April 4, 2017

"I love this game it really helped my class with their times tables."

Mya, St Marys School

Thursday, April 20, 2017

"It really helps people who are any age to learn divide times add subtract its really good I think more kids should this site."

Mr Pearson, England

Friday, June 29, 2018

"For the Connect 4 factors game it would be useful if the counters were different colours for the 2 player game."

Camilla, England

Friday, January 25, 2019

"It really does help with my maths and is so fun."

Nick Staples, Waipahu Intermediate Teachers

Saturday, April 4, 2020

"Connecting 4 factors took me a while!!!

You need to start with a decent number of 7’s !"

Tamra McIntyre, Austin, Texas

Friday, April 24, 2020

"Hi, Transum!

I love your website. Have been teaching middle and for six years and your starters are my most-used warm-ups.

Have been watching and playing Connect 4 as an individual today and noticed that it is possible to end with two holes and two numbers which violate the rules, preventing a win. Is it possible to win?

Thank you.

[Transum: Thank you for your kind words Tamra. This activity is one of those that takes advantage of randomly generated numbers. Each of the numbers to be dropped into the grid is randomly generated so it may not be possible to fill the grid with the available numbers.]"