Back by popular demand – we’re going to run the FOBISIA Code Breaking Maths Challenge 2025-6 again.  The dates will be:

Monday 22nd and Friday 26th September 2025.

Last year we had close to 120 schools taking part with over 22,000 students completing at least one code level.  We hope that this year’s event will be equally successful.

The event is now closed for registration.