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