Sunday Afternoon Maths LXI

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