1. YahooHoo
Join Date
Dec 2007
Posts
1

## brain teaser again.................?

if u r given 'n' rods of length{1,2,3,4.....n} respectively.
what is the maximum no. of triangles that can be formed using these rods at a time?
one rod can be used only once.........
for example if n=5 , the max. no. of triangles formed will be 1..........using the combination(3,4,5)
so once again read it carefully....
you cant use one rod more than once
suppose n=5 ,then the answer is 1
using combination(3,4,5) or (2,3,4)
if u r using rod "3" in one combination
you cant use it in another combination..
in other words you have to show all your combinations keeping them on a table at a time....and you have to exploit maximum no. of rods possible
for simplicity try to device a method for n=100 and generalise it for n.....
hope you all understand the question better now.........

2. YahooHoo
Join Date
Dec 2007
Posts
1
wow, well blown away on this one. lol

3. YahooHoo
Join Date
Dec 2007
Posts
1
hummmnnn,,,,uh??wat?

4. Entry Level Fresher
Join Date
Aug 2009
Posts
15
for 100: 32 triangles
for n : [(n-1)/3] where [] denotes greatest integer function
based on principle that sum of any two sides of triangle will be greater than 3rd side....so side of length one cant be included in any combination...all others will be used serially

5. Fresher
Join Date
May 2010
Posts
45
why are we making triangles??!! :-0 i think we should make circle!! ao that it could be one!!

6. Fresher
Join Date
May 2010
Posts
30
yes you are right amrita

7. Fresher
Join Date
Jan 2012
Posts
32
Wow It is very nice...

8. Entry Level Fresher
Join Date
Jul 2013
Location
Illinois
Posts
13
difficult one.....