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