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