Sunday Afternoon Maths XIII

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