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