Advent calendar 2015

Archive

Show me a random puzzle

Tags

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