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