Sunday Afternoon Maths VLII

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