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