If you have a 4 oz and a 9 oz glass how do you get 6 oz of water?

Answer 1

Fill the 9oz glass.

Pour the 9 oz glass into the 4oz glass until the 4oz glass is full. You now have 5 oz in the 9oz glass.

Empty the 4oz glass

Pour pour the remaining water from the 9oz glass into the 4oz glass until it is full. You now have 1 oz in the 9oz glass.

Empty the 4 oz glass.

Pour the remaining 1oz in the 9oz glass into the 4 oz glass.

Fill the 9oz glass.

The 4oz glass with 1oz in it can now fit a total of 3 more oz.

Pour the 9oz glass into the 4oz glass until it is full. You now have 6oz in the 9oz glass.

Answer 2

Fill the 4 oz glass to the top, then pour the water from the 4 oz glass into the 9 oz glass. This leaves 3 oz of space remaining in the 9 oz glass. Then, fill the 4 oz glass again and pour it into the 9 oz glass until it's full. This way, you'll have exactly 6 oz of water in the 9 oz glass.