Sunday Afternoon Maths XIII

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