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