One Player Challenge 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).

Clear Board

Choose one of the following two options

First player's name:

Second player's name:

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 or winning three games.

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

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!!!

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 has now been updated so that the numbers that appear are chosen in such a way that it is always possible to fill the grid. This was not the case when you tried so please have another go. Good luck.]"

Lisa, England

Wednesday, July 1, 2020

"I found that it is not possible to win this game.

[Transum: Yes it is possible to complete the one-player challenge Lisa]"

Emiy, England

Thursday, July 2, 2020

"Hi, I think your website is really cool and I just had a question. Is a win possible? I've tried many, many times and I just can't figure it out since it always goes red because there are 4 factors in a row.

[Transum: Yes Emily. It is certainly possible but quite difficult. Instead of trying to fill the board, set yourself the challenge of getting as many numbers on the board as possible before a red line appears. Then work to beat your personal best. Recognising the common factors is a good skill for you to develop. Good luck]"

Hayley, Cardiff

Saturday, June 26, 2021

"This is amazing.........
my class wanted to do this whole lesson."

Monday, March 21, 2022

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.

#### Remainder Race

A game involving chance and choice requiring an ability to calculate the remainder of a division.

Transum.org/go/?to=remainder

#### Square Pairs Game

A game for two players who take turns to select two numbers that add up to a square number.

Transum.org/go/?to=sqpg

#### Hexblock Hunter

The mathematical version of TV's Blockbusters game show. Find the mathematical words from the clues.

Transum.org/go/?to=hexblock

#### Nevertheless

Players decide where to place the cards to make an equation with the largest possible solution.

Transum.org/go/?to=nevertheless

The solutions to the one-player challenge and other Transum puzzles, exercises and activities are available here when you are signed in to your Transum subscription account. If you do not yet have an account and you are a teacher, tutor or parent you can apply for one by completing the form on the Sign Up page.