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