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