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