For reasons that will become apparent shortly, we have been reading the Monday puzzle page by Alex Bellos in the Guardian. We came across the following gem, which, given that this is the week we celebrate Ada Lovelace Day, seems more than appropriate for this Sunday morning. Have fun!
https://www.theguardian.com/science/2017/mar/27/can-you-solve-it-take-the-ada-lovelace-challenge