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