Advent calendar 2015

Archive

Show me a random puzzle

Tags

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