* creativity, e.g. can I use floor/ceiling, double-factorial, other exotic stuff - you don’t need to, but if you like to, sure, and it might help if you decide to push beyond 10.

Lots of replies to this (many spoilers) - I forgot some of the clarifications people sometimes need, oops. Rules are a little loose because this encourages creativity. Some people don’t like including √, some like to include concatenation. Generally () included & symbols before the first 2 are fine.

Your website says 1 March is the deadline, unless I’ve misunderstood something. www.lms.ac.uk/news/zeeman2...

@ima-maths.bsky.social website agrees ima.org.uk/27758/christ...

Please clarify the deadline. Thanks.

Thankfully the system here worked sensibly and recorded everything here as correct. He took great pleasure in looking through the ‘correct’ answers after it was marked and seeing that they differed.