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