Advent calendar 2015

Archive

Show me a random puzzle

Tags

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