mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

19 December

1 = 1/2 + 1/4 + 1/8 + 1/16 + 1/16. This is the sum of 5 unit fractions (the numerators are 1).
In how many different ways can 1 be written as the sum of 5 unit fractions? (the same fractions in a different order are considered the same sum.)

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024