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