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 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018


List of all puzzles

Tags

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

Archive

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