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