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