Advent calendar 2015

Archive

Show me a random puzzle

Tags

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