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