Crossnumber winners, Issue 06

Did you solve it?

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It’s that time of the year again: time to announce the winners of the Chalkdust prize crossnumber #6! Before we reveal the winners, here is the solution:

1 2
1 3 6 9 1 4 4 8 7 1 6 6
7 2 4 3
2 3 1 3 2 5
7 8 0 7 2 3 2 2 3 0 5 3
2 1 4 5 2 5 4 0 2
1 0 1 5 2 7 2 9 7
8 6 3 8 6
9 9 9 9 9 9 9 9 1 0 3
1 6 7 9 9 9 5
8 5 1 0 4 7 5
8 9 1 3
2 1 1 1 2 3 4 3 2 1
4 7 9 5 6 7 8 7 8 0 9 1
3 1 5 3
1 7 4 7 5 1 5 2 1 8 5 0 9 5

I hope you enjoyed the inverted rotational symmetry as much as I enjoyed designing the grid! The sum of the across clues was 6,323,098.

Picking the winners

We received 76 entries, 63 of which were correct.

So without further ado, the winner of the Chalkdust Issue 06 crossnumber competition is Jessica Rose Marsh, who wins a £100 goody bag from Maths Gear. The runners-up, and winners of Chalkdust T-shirts, are Patrick Newberry, Amy Rogers and Rata Ingram.

Thank you to everyone who entered the crossnumber competition! The competition will return in Issue 07 of Chalkdust, released in March…

Matthew Scroggs is a PhD student at UCL working on finite and boundary element methods. His website, mscroggs.co.uk, is full of maths and now features a video of him completing a level of Pac-Man optimally.
Twitter  @mscroggs    Website  mscroggs.co.uk    + More articles by Matthew

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