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