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