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