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