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