Discover new books on Goodreads
See if your friends have read any of Greg Ross's books
Greg Ross’s Followers (107)
4,985 books
|
878 friends
2,142 books
|
84 friends
905 books
|
47 friends
1,591 books
|
39 friends
227 books
|
251 friends
861 books
|
116 friends
269 books
|
24 friends
1,042 books
|
92 friends
More friends…
Greg Ross
Goodreads Author
Born
in Pittsburgh, PA, The United States
Website
Genre
Member Since
October 2010
Friendly Numbers
The divisors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. Add those up and divide the sum by 30 itself and you get 12/5.
The divisors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, and 140. Add those up and divide the sum by 140 and you also get 12/5.
This makes 30 and 140 a friendly pair. Other members of their little club are 2480, 6200, and 40640.
Interestingly, no one knows whether 10 has such a p
Read more of this blog post »
More books by Greg Ross…
Greg’s Recent Updates
|
Greg Ross
wrote a new blog post
|
|
|
Greg Ross
is currently reading
|
|
“Two atoms are walking down the street. One says, “Wait, I think I lost an electron.” The other says, “Are you sure?” The first one says, “Yes, I’m positive.”
― Futility Closet: An Idler's Miscellany of Compendious Amusements
― Futility Closet: An Idler's Miscellany of Compendious Amusements
“Charlie Chaplin once lost a Charlie Chaplin lookalike contest. He didn’t even make the finals. Afterward he told a reporter that he was “tempted to give lessons in the Chaplin walk, out of pity as well as in the desire to see the thing done correctly.”
― Futility Closet: An Idler's Miscellany of Compendious Amusements
― Futility Closet: An Idler's Miscellany of Compendious Amusements
“After I’m dead I’d rather have people ask why I have no monument than why I have one.” —Cato the Elder”
― Futility Closet: An Idler's Miscellany of Compendious Amusements
― Futility Closet: An Idler's Miscellany of Compendious Amusements
Topics Mentioning This Author
| topics | posts | views | last activity | |
|---|---|---|---|---|
Crazy Challenge C...:
Perpetual Music Relay (PMR), take two
|
1064 | 272 | Dec 27, 2016 12:29PM |
“How these curiosities would be quite forgott, did not such idle fellowes as I am putt them downe!”
― Brief Lives
― Brief Lives
“I find that a great part of the information I have acquired by looking up something and finding something else on the way”
―
―
“The man who publishes a book without an index ought to be damned 10 miles beyond hell, where the Devil himself cannot get for stinging nettles.”
―
―