Advent calendar 2015

Archive

Show me a random puzzle

Tags

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