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