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