Question

Measure 4 gallons of water using a 3 gallon jar and a 5 gallon jar

Answer 1

use 4/5 of the 5 gallon jar or 1 and 1/3 of the 3 gallon jar

Explanation:

Answer 2

Fill the 5 gallon jug.

Pour the 5 gallon jug into the 3 gallon jug.

Empty the 3 gallon jug and pour the remaining 2 gallons in the 3 gallon jug.

Fill the 5 gallon jug and pour 1 gallon into the 3 gallon jug (remember it will only take one gallon)

Viola the remaining 5 gallon jug will have exactly 4 gallons remaining.