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