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