Advent calendar 2018

24 December

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


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


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


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