#### Splat Square 100

This would be a useful plenary.
I use it in a concept attainment model for example I start by giving students three numbers that fit my set and highlight them in one colour (ie. red). I invite them to make a reasonable guess of others that might fit and if they do I colour them red also and if not they get a different colour (ie blue). As the numbers narrow down they need to start 'testing' their theory i.e I think it might be '25' because I think these numbers are all factors of 25 etc.
I have used this with sets like: even numbers, multiples, triangular numbers.