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