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