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