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