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