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