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