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