Advent calendar 2015

Archive

Show me a random puzzle

Tags

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