There are 20 questions in this test, involving numbers up to the 12 times table. There's no time limit, but it should take you just a few seconds to answer each question. Ready?
Enter all answers as numbers only, e.g. 32, not thirty two.
Kelly Oakes is science editor for BuzzFeed and is based in London.
Contact Kelly Oakes at email@example.com.
Got a confidential tip? Submit it here.