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