A while ago, Chris Moyles had a TV show called ‘Quiz Night’. Part of the program was a maths quiz, done by various pop acts (including, shudder, One Direction).
A lot of these are available on YouTube, so I collected them all together to make a convenient playlist.
I’ve used these a lot. They’re fun and engaging.
There are others here too: http://www.mattgillbe.co.uk/CMQN_maths_questions.html
Warning: Saturdays one is suggestive throughout and has solution 69…