I'm now halfway through my monthly trawl through London by numbers. Thanks for all the suggestions you've offered, whether in the comments box or by email. I know I haven't used all of them, but that's because I'm being picky. Nothing which involves measurement is being included, nor anything which isn't specifically about London. And I'm also trying to concentrate on the relevant rather than the coincidental, which has meant leaving lots of your ideas out. But the second half of the month is going to be even harder to fill. There just aren't as many London facts floating around for 23 as there are for 3. so I'm expecting my lists will get a lot shorter. Unless you can help.
What I need, to beef things up a bit, are some interesting questions. Questions that you don't know the numerical answer to, but that probably have an answer that's 30 or less. If you lot can come up with lots of fascinating questions, then somebody on here must be able to find out what number they match up to. Here's the sort of thing I mean, to get you started (and I'll add your best questions here during the day).
» How many London buildings are taller than St Paul's Cathedral?(Looks like 24, or maybe 29 if you include masts, chimneys and arches) » Where's the London bus stop served by the greatest number of routes? (I wonder if it's Bromley Sainsbury's (stop N) on Kentish Way, with 19 different bus routes) » How many road bridges cross the Thames in London? » On average, how many days each month does it rain in London?(Answer: 12¾) » How many lifts are there in the Gherkin? » In 2012, how many different Olympic sports will be held in London? » How many of Shakespeare's plays are set (at least in part) in London? » Which London mainline station has the most platforms?(question from FSF)(Answer: Waterloo, Victoria and Liverpool Street, each allegedly with 19) » How many London-wide radio stations are there?(question from Geoff)(Answer: 20, according to RAJAR) » How many are there in London? » (any more?)