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Here's a simple game at which a human can out-fox even the cleverest algorithm.

The INI is celebrating its 30th birthday. What is it and what is it do for maths and mathematicians?

Here's our coverage from the International Congress of Mathematicians 2022, including the Fields Medals and other prizes.

The COVID-19 pandemic has amplified the differences between us. Understanding these inequalities is crucial for this and future pandemics.

There have been accusations that the modelling projecting the course of the pandemic was too pessimistic. Are they justified?

If only notes are involved then if you open an envelope with say £1 that will limit the choices. If the envelopes are filled with care, so that the smaller one does not contain 1 (or an odd amount) of the minimum denomination, then all is good.

Try my solution: http://lesliegreen.byethost3.com/articles/TwoEnvelope.pdf