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