mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

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 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

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

Archive

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