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