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