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