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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,626

Twenty-one gas cylinders are to be loaded onto three trucks. Seven are full, seven are half-full and seven are empty. A full cylinder weighs 50kg and an empty cylinder weighs 20kg. How should they be loaded onto the trucks so that each truck is carrying the same weight?

(I found this while surfing, and haven't even solved it myself yet)

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

Its not very difficult, just think about it for a while.

Why did the vector cross the road?

It wanted to be normal.

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 21,506

Ist truck:- 3 full cylinders, 1 half-full and 3 empty

IInd truck:- 2 full cylinders, 3 half-full and 2 empty

IIIrd truck:- 2 full cylinders, 3 half-full and 2 empty

PS:- The Moderator may remove my reply if he/she wants it to be left open.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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