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