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