Sunday Afternoon Maths XIII

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