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 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

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

Archive

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