• Classroom Resources
  1. How likely is it you'll share a birthday with someone?

    Duration: 03.29

    Watch Clip duration: 03.29

    Why you only need 35 people for it to be very likely that two will share a birthday.

  2. Logic problem - who's wearing the black hat?

    Duration: 04.13

    Watch Clip duration: 04.13

    How it's possible to work out what colour hat a group of three people are wearing.

  3. Probability problem - how many women were in a lecture?

    Duration: 04.03

    Watch Clip duration: 04.03

    A probability problem, with the chance of people coming out of a lecture all being women.

  4. The Monty Hall Problem - probabilities and game shows explained

    Duration: 05.51

    Watch Clip duration: 05.51

    Marcus du Sautoy explores the famous game show problem with Alan Davies.