Interview Question

Business Analyst Interview

How do you make 4 gallons from a 3 and 5 gallon jug?

Answer

Interview Answer

5 Answers

1

Fill the 3 gallon jug, pour it into the 5 gallon jug, fill the 3 gallon jug again, fill the 5 gallon jug until it is full (leaving 1 gallon left in the 3 gallon jug) dump out the 5 gallon jug, then pour your remaining 1 gallon into the 5 gallon jug, then fill the 3 gallon jug and add it to the 1 gallon in the 5 gallon jug.

Anonymous on Jun 1, 2011
1

I have another method of getting 4 gallon.
    1) Fill 5 gallan jug
    2) Pour from 5 gal jug to 3 gal jug till 3 gal jug is full
    3) Empty 3 gal Jug
    4) Pour from 5 gal jug to 3 gal jug
    5) Fill 5 gal jug
    6) Pour from 5 gal jug to 3 gal jug till 3 gal jug is full.

    Method Statistics:
    ==================
      Total liquid usage : 10 gallons
      Total liquid wastage : 3 gallons (reusable?)
      Total steps required : 6

Prasad JVV on Jun 15, 2011
0

Updated one from previous.
    1) Fill 5 gallon jug
    2) Pour from 5 gal jug to 3 gal jug till 3 gal jug is full
    3) Empty 3 gal Jug
    4) Pour from 5 gal jug to 3 gal jug
    5) Fill 5 gal jug
    6) Pour from 5 gal jug to 3 gal jug till 3 gal jug is full.

    Method Statistics:
    ==================
      Total liquid usage : 10 gallons
      Total liquid wastage : 3 gallons (reusable?) + 3 gallons remained in 3 gal jug
      Total steps required : 6 + 1 (to empty 3 gal jug?)

Anonymous on Jun 15, 2011
2

1. Fill the 5 gallon jug.
2. Pour the 5 gallon jug into the 3 gallon jug. (Leaves you with 2 gallons in 5 gallon jug)
3. Empty the 3 gallon jug and pour the remaining 2 gallons in the 3 gallon jug.
4. Fill the 5 gallon jug and pour 1 gallon into the 3 gallon jug (remember it will only take one gallon)
5. Viola the remaining 5 gallon jug will have exactly 4 gallons remaining.

D.G. Fox on Sep 29, 2011
5

Fill up each jug half way. 2.5+1.5=4

J Cloud on Oct 19, 2011

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