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