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