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