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