Not 3 in a line

How many counters can you place on the grid without getting 3 in a row?

Create my FREE account

including a 7 day free trial of everything

Email Address

Password

Newsletter

The URBrainy email newsletter (sent every 2 weeks) provides resource updates and helpful guides for teaching and learning.

Yes, I would like to receive the URBrainy newsletter.

I agree to the Terms and Conditions and Privacy Policy

Already have an account? Sign in

Addition and subtraction related to the six digits shown.

An easy version of the game of Nim. Great for logical thinking and you can always win (if you know what you are doing!)

The very simplest forms of magic squares and some ideas on how to turn them into colour patterns.

Fill in the puzzle so that every row, column and diagonal contains the numbers 1 to 4.