You may also like

problem icon

Baked Bean Cans

Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?

problem icon


There are to be 6 homes built on a new development site. They could be semi-detached, detached or terraced houses. How many different combinations of these can you find?

problem icon


Investigate the number of faces you can see when you arrange three cubes in different ways.

So It's 28

Stage: 1 Challenge Level: Challenge Level:1

We had very few ideas sent in but it seems that most pupils went on to the other challenge focussed on $28$: $28$ and It's Onwards and Upwards.

Matthew wrote the following and sent in the picture to go with it:

I used $28$ tessellating crosses, which are on the file. Looks quite cool. The scary thing is, after copying and pasting $28$ crosses (having just made them a random size), I, co-incidentally, couldn't fit any more than $28$ on the page ...

and Emma wrote:

I got grid paper and drew $14$ squares that were touching and drew a line diagonally through every square. I got $28$ triangles because I had $14$ squares and split them in $2$ which made $28$ because $14+14=28$. That is how I got $28$ triangles.