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