Sunday Afternoon Maths XXXVII

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