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Three-digit numbers
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Are your multiplication problems real or imaginary?
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The taxi problem revisited
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Three doors
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The coin tossing problem
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Never forget your mum's birthday
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Fight Ebola with your computer
A crowdsourced computing project looks for molecules that can disable the Ebola virus.
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When things get weird with infinite sums
What is 1-1+1-1+1-1+...? How infinite sums challenge our notion of arithmetic.
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Maths in a minute: Writing infinite sums
How to write a sum that's infinitely long.
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Mathematical mysteries: Hailstone sequences
Here's an easy game that leads you straight to an unsolved question in maths.
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Writing the unwritable: up-arrow notation
How to write down unimaginably large numbers using just a few symbols.
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The philosophy of cosmology
Can philosophy help explain our Universe?
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Tweets by @plusmathsorg
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