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