Puzzle Archive

May 2019 solution

The answer to this month’s puzzle is π−1.

The loops can be dissected into overlapping rectangles, quarter-circles, and a central square as shown to the left. Furthermore, it can be shown that the diameters of the seven circles are 670, 671, 672, 673, 674, 675, 676. From here it is a matter of properly adding (and occasionally subtracting) the various component areas to get the correct answer.

Correct answers from:
Nima Oparvar
Guillermo Wildschut
M. Schlögel
Dan Lin
Raymond Lo
Malacpersely
Heidi Stockton
pat pumpkin
Jeffrey Fu
Milos Mitrovic
Siddhartha Srivastava
anthonyclays
Tyler Bryson
brby
Anuj Shetty
SD
Jon Kutasov
Xingyu Zhou
Robert Oxer
Ihor Kulyk
Dan Manela
Yossi Rosen
George Wahid
Carl (Casey) Dorfman
Senthil Rajasekaran
Nathan Azaria
Rachel O’Neill
Richard Waner
Andreas Komissopoulos
Peter Mulreid
SM
Aufar Gilbran
Ema Pajić
RVDL
RPC
abhagwat
Hutama
John Quitno
Eric Wu
balbert
Josh Nielsen
Stranger
Sandip Ghoshal
creampuff
Nikhil Ravi
Esser Qu
Kartik Kolanukuduru
Sherwin
Isaac Garfinkle
oquechy
Matej Kollar
cho_san
Andrey Smirdin
Jinjie Zhang
yyf
JoseLuis MirandaOlvera
Kevin Gu
kevjia
Glauber Guarinello
404akhan
Kristof S
Sébastien Geeraert
Alex Varga
Willem Hoek
Brooke Lynn Hytes
pierrechanelrouxel
Cheston Chow
Michael DeLyser
Philip Akpan
pakpan
a-alaradi
wowowow
s. Andrew
Kendall Yu
Jsu
mCki
Bagatur Askaryan
Pete Weistroffer