Brain Teaser

We've reached our finale, Part 3 of Brain Teasers of measuring out liquid volumes. I hope you've got the hang of it by now! - QBF

III. Given a five ounce glass and a three ounce glass, measure exactly four ounces. 

Again, your water supply is limitless and you can fill and empty glasses as you please.

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ANSWER:

1. FILL UP 3 OUNCE, POUR INTO 5 OUNCE -- 3 OUNCE TOTAL
2. FILL UP 3 OUNCE, POUR INTO 5 OUNCE -- 1 & 5 OUNCE TOTALS
3. EMPTY 5 OUNCE
4. POUR 1 OUNCE INTO 5 OUNCE -- 1 OUNCE TOTAL
5. FILL UP 3 OUNCE, POUR INTO 5 OUNCE -- 4 OUNCES ACHIEVED!!