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