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