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