Number of Nails in Picture?

  • Thread starter jleo313
  • Start date
  • #1
2
0
How many nails are in the picture? How did you arrive at this solution?
 

Attachments

  • NAIL PICTURE.jpg
    NAIL PICTURE.jpg
    69.6 KB · Views: 523

Answers and Replies

  • #2
phinds
Science Advisor
Insights Author
Gold Member
16,838
7,712
How many nails are in the picture?

lots

How did you arrive at this solution?

I guessed
 
  • #3
2
0
Excellent guess. :)
 
  • #4
223
10
amount of nails < infinity
 
  • #5
35,399
11,766
Including expected, but not visible nails, between 1 000 and 100 000.
The remaining uncertainty can be reduced by a [insert your favorite useless education here] student, ...
...weighting them (and a few individual nails). You don't want to wait until he counted them, right?
 
  • #6
D H
Staff Emeritus
Science Advisor
Insights Author
15,393
686
How many nails are in the picture?
800-900.
How did you arrive at this solution?
That looks like about 5 pounds of 2" common nails, so 800-900 nails, depending on the manufacturer.
 
  • #7
54
0
answer is zero nails. since op was asking for human nails. end thread/
 
  • #8
42
1
best bet is 1600. Please count it!
 
  • #9
D H
Staff Emeritus
Science Advisor
Insights Author
15,393
686
Don't you just hate these post and run kind of brain teasers?

It's been two weeks since the person who posted the question last came back to the site.
 
  • #10
5
0
I DON'T KNOW. However I will try a stupid approximation technique:

Let N be the number of nails ,
V be the average volume of the nail bulk, and u be the average volume of a single nail (at different orientations). Let l be the length of a single nail. Exclude the empty spaces between the nails!

Identify the average shape of the nail bulk. Find u with respect to l (I.e. u = f(l) ). Find V with respect to l (I.e. V = g(l) ).

Now Nu = V, so N = (V/u) = g(l)/f(l)
 

Related Threads on Number of Nails in Picture?

  • Last Post
Replies
13
Views
3K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
22
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
16
Views
3K
  • Last Post
3
Replies
60
Views
22K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
  • Poll
  • Last Post
Replies
11
Views
1K
Top