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