As a former physics nerd, when my LCCI Teaching English for Business cert tutor told me all classes should do a numbers review I didn’t need much more persuading, and I’ve been churning out worksheets and articles on the topic ever since. This one is by far the best, also being good for topic-specific vocabulary, question formation (especially How… questions), and comparatives.
Students are given different bits of trivia with numbers in them, e.g. “Tokyo Tower is 12 metres taller than the Eiffel Tower” and make any of them into questions (“How much taller is Tokyo Tower than the Eiffel Tower?”) to ask their partners. As the first guess is very unlikely to be right, students then give hints with “Much taller”, “A little shorter” and “A tiny bit taller” etc until their partner gets exactly the right number. Most of the worksheets then go on to test them on the pronunciation of the numbers they have just been using:
Medical numbers trivia (on onestopenglish so subscription needed)
Click on the TEFLtastic Classics tag below for the rest of this series of stuff I use absolutely all the time.