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