How many ways can you write 21?

St Nicholas Grade 3s are playing a game of writing 21 in as many ways as they can - sharing their ideas with learners from other schools.

So far, they have come up with 20+1

But there are other ways of writing 21 - what about √462 ? or other mathematical equations

Or you could even write it in another language - vingt un is 21 in French.

Please comment on this post with your Name and Grade or School.

You can even play if you are a teacher, parent or past pupil.