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