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