mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2016

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.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026