Advent calendar 2015

Archive

Show me a random puzzle

Tags

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