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