5 December

Today's number is the number of ways that 35 can be written as the sum of distinct numbers, with none of the numbers in the sum being divisible by 9.
Clarification: By "numbers", I mean (strictly) positive integers. The sum of the same numbers in a different order is counted as the same sum: eg. 1+34 and 34+1 are not different sums. The trivial sum consisting of just the number 35 counts as a sum.


Show me a random puzzle
 Most recent collections 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019