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