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