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.