Advent calendar 2023

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