Advent calendar 2020

13 December

There are 6 ways to split the sequence of the numbers 1 to 5 into three shorter sequences:
Today's number is the number of ways to split the sequence of the numbers 1 to 10 into five shorter sequences.

Show answer


Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021