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#1 2005-07-03 21:05:11
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 46,182
Try this one!
I have 4 marked weights with me and they all add up to 40 kg.
With a pair of scales, I can distribute any weighment from 1 to 40 kg(Whole numbers).
What are the four weights????
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2 2005-07-04 04:15:55
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: Try this one!
I think I've seen that one somewhere on this site before, but anyway, I've done this before so I won't say.
Why did the vector cross the road?
It wanted to be normal.
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#3 2005-07-04 10:34:27
- MathsIsFun
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- Registered: 2005-01-21
- Posts: 7,711
Re: Try this one!
Ummm ... 1kg, and ...
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#4 2005-07-06 22:17:28
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 46,182
Re: Try this one!
1, 3, 9, and 27 kg
1 kg can be directly weighed
3-1=2, (Which means putting 3kg on the left pan and 1kg on the right,
2kg of material can be got)
3 can be directly weighed,
3+1=4,
9-(3+1)=5,
9-3=6,
(9+1)-3=7,
9-1=8,
9 can be directly weighed,
9+1=10
and so on.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#5 2005-07-06 22:47:10
- MathsIsFun
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- Registered: 2005-01-21
- Posts: 7,711
Re: Try this one!
You solved it too quickly !
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#6 2005-07-06 22:47:54
- MathsIsFun
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- Registered: 2005-01-21
- Posts: 7,711
Re: Try this one!
You solved it too quickly !
Some of us are a bit s....l...o....w 
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#7 2012-05-02 12:26:20
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Try this one!
Agreed,MIF. Some of us are so slow,that we reply 7 years later.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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