Advent calendar 2018

5 December

I make a book by taking 111 sheets of paper, folding them all in half, then stapling them all together through the fold. I then number the pages from 1 to 444.
Today's number is the sum of the two page numbers on the centre spread of my book.
Tags: numbers, books


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multiples advent balancing taxicab geometry parabolas scales triangle numbers prime numbers dice 2d shapes 3d shapes averages crossnumber pascal's triangle triangles means speed dates unit fractions crossnumbers cube numbers doubling hexagons tiling ellipses chess people maths lines complex numbers folding tube maps odd numbers median chocolate digits planes sum to infinity rugby routes shape division digital clocks wordplay squares dominos factorials time perfect numbers star numbers elections proportion palindromes geometry spheres coins factors volume irreducible numbers angles colouring shapes sport sums indices regular shapes dodecagons ave games gerrymandering square numbers remainders coordinates calculus graphs cryptic clues integers rectangles surds multiplication products trigonometry range percentages logic crosswords bases symmetry functions addition number fractions mean the only crossnumber numbers chalkdust crossnumber circles grids clocks area partitions books money polygons perimeter probability square roots differentiation probabilty menace sequences cryptic crossnumbers arrows algebra floors quadratics cards integration christmas


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