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