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