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