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