"Alastair Campbell advocating a return for Labour to its roots in calculus and infinite series" - @TomRivlin@twitter.com
Here's a fun puzzle: place the numbers 1-9 in each square such that each row and column contains each number exactly once, and so that there is a solid dot between adjacent squares if one number is double the other, and there is a circle between squares if the numbers are consecutive, and every edge that could have some marking does.
Mathematician and design enthusiast. Computing, music, science, video games and art.
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