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