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