There are 8 stones which are similar except one which is
heavier than the others. To find it, you are given a pan
balance. What is the minimal number of weighing needed to
find out the heaviest stone ?
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Answer / siddhartha
@Monu, even if 9 stones are there, only two weighings are
required...
In general, in n weighings, you can determine the heavier
stone out of 3^n stones...
If 9 stones are there...
3---3---3
weigh the first two... if one is heavy, take that group,
else take the third group of three...
In this group of three thus taken, weigh any two. If any of
them if heavy, that is the stone.
Else the remaining one stone is the heavier one... :)
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / vijayaraj
monu ...you r wrong. There 8 stones. out of which one is
heavier.
2 times needed. divide 3,3,2 is correct.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / debaroon
Urmila,Vamsee,Vishwa or any one can give the answer with
clear justification in details.
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / monu
idiots...........
read the question properly
is says that there are 8 stones with similar weight
EXCEPT 1 i.e. total 9 stones are there.....
now divide 4 on each side.That makes it 8
reamining 1 which is heavier then others...
so....minimum weight required on both the side is 4..
got it..........
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / shilpa
divide the stones into 4 and 4, weight it find which is
heavy. Consider which is high weighted and then again
divide those stones into 2 and 2, weight it find which is
hevy. consider which is high in weight and weigh the
remaining 2 weights and thus highest weighed is found. Thus
Answer is 3.
| Is This Answer Correct ? | 2 Yes | 5 No |
Answer / sanat
the right answer is 3
first divide the stones into 2parts 4 4
then see which one is heavier
then divide the heavier part into two parts 2 2
then measure the two stones of heavier part
| Is This Answer Correct ? | 2 Yes | 7 No |
Answer / kiru, chennai
minimum no of steps required:3
answer:
1 2 3 4 5 6 7 8
take 1,2&3,4
if both are equal move on to next
take 3,4&5,6
if both are equal move on next
take 6&7
if both are equal 8is the heavier one
else 7 is the heavier one
else
take 4 & 5
if both are equal
6 is the heavier on
else
5 is the heavier
else
take 2 & 5
if both are equal
1 is the heaveier one
else
2 is the heavier one
| Is This Answer Correct ? | 0 Yes | 9 No |
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