Sunday Afternoon Maths XIII

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