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December 15, 2008

Water jar problem



You have a three gallon and a five gallon measuring device.
How will you measure out four gallons.

10 comments:

chitra said...

its easy..
u can take d 3 gallon masuring device n holding it diagonal, as when properly held diagonaly it can withold only half its measure.
using it measure exactly 1.5 gallons that is its half...do the same with the 5 gallon measuring device to measure 2.5 gallons...adding which we get exactly 4 gallons

right .... isn't it??!!!

Secret Squïrrel said...

@Chitra - that's the best answer to this type of problem I've ever seen but it will only work if the containers have sides that are parallel to each other (eg. a cyclinder). A bucket, bowl, or bottle won't do. However, your method doesn't waste any water at all. Marvelous!

Anonymous said...

Solution

Three galon device-Five gallon device
0 - 5
3 - 2
2 - 0
2 - 5
3 - 4

Senthil Prakash said...

Solution

Three galon device-Five gallon device
0 - 5
3 - 2
2 - 0
2 - 5
3 - 4

Secret Squïrrel said...

Or slightly longer soln:

3G-5G

3 - 0
0 - 3
3 - 3
1 - 5
1 - 0
3 - 1
0 - 4

Anonymous said...

hmmm, you all are so stupid.

the answer was shown in die hard 3 the movie before. (altho not completely), a lot people still dont know how after watching the movie.

it's an elementary school simple algebra problem. i figured the half and half answer before, but unfortnately my friend you need a regular shape container to do that, what if you got a completely irregular jar or container, how you gonna fill perfectly half water on each jar, huh? stupid that you are.

anyway, now im gonna show you stupid how to do this with or without regular jars, and it WILL work under any circumstances.

ok, first off, you fill the 5 gallon jar.

then you use the full 5 gallon jar of water to fill the 3 gallon jar until it's full, now it leaves perfect 2 gallon of water in the 5 gallon jar.

now empty that 3 gallon jar, then put the rest of water in 5 gallon jar (exactly 2 gallon)into the emptyed 3 gallon jar. now you have 2 gallons of water in the 3 gallon jar, and nothing in the 5 gallon jar.

Now refill the 5 gallon jar, so you have 5 gallons water in the 5 gallon jar, and 2 gallons of water in the 3 gallon jar.

FINALLY, use the refilled 5 gallon jar of water to fill the 3 gallon jar until it's full.

DO YOU GUYS GET IT NOW? HUH? STUPID, BECAUSE THERE WERE 2 GALLONS OF WATER IN THE 3 GALLON JAR, SO THERE'S 1 GALLON OF SPACE. YOU FILL 5 GALLONS OF WATER IN THAT 1 GALLON OF SPACE, HOW MANY WATER WILL BE LEFT IN THAT 5 GALLONS JAR???

FOUR GALLON!!!!!!!

NOW UNDERSTOOD???????

JEE, PEOPLE'S INTELLIGENCE NEEDS APPROVED THESE DAYS.

PFFT!!!!!!!!!!!!!!!

BTW, I HAVE A MASTER'S DEGREE IN ECONOMICS, THE EVERYDAY MATH I DEAL WITH ARE CALCULUS AND NON-LINEAR MUTIL-VARIABLE REGRESSIONS IN ECONOMETRICS. SO IM NOT JUST SOME TEEN TRY TO SHOW OFF SOMETHING LEARNT IN MOVIES. JUST TO CORRECT YOU STUPIDITY!!!!!!!

Secret Squïrrel said...

@Anonymous #2 - what a pleasant fellow you are. You solution is exactly the same as that given earlier by two previous posters (but written much less succinctly and with considerably more uncalled-for rudeness). You also missed the alternative solution which starts by filling the 3 gallon container first.

A bit ordinary for someone who claims to be so intelligent. Shame that intelligence doesn't permit you to use proper grammar and syntax, or even the correct words (eg "JEE, PEOPLE'S INTELLIGENCE NEEDS APPROVED THESE DAYS" should be "Gee, people's intelligence needs TO BE IMPROVED these days" - ironic). Your genius also didn't prevent you from posting the same text five times.

You are an insect.

Anonymous said...

wow u guys r crazy! lol

Nagalinga said...
This comment has been removed by the author.
Anonymous said...

OMG!!! Anonymous is such a stupid asshat!!! LOL!