Sunday Afternoon Maths XXXVI

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