Sunday Afternoon Maths LXI

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