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