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