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