mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

24 December

1,0,2,0,1,1
The sequence of six numbers above has two properties:
  1. Each number is either 0, 1 or 2.
  2. Each pair of consecutive numbers adds to (strictly) less than 3.
Today's number is the number of sequences of six numbers with these two properties
Tags: numbers

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020