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