What is the minimum number of drops required for 4 ounces?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

Droplets are discrete units, so you must count whole drops to reach a target volume. One drop almost never equals 4 ounces, so it cannot meet the goal by itself. The smallest whole number of drops that could possibly reach 4 ounces is two, since you can’t use a fraction of a drop. In other words, you divide the target by the volume per drop and round up to the nearest whole drop; with typical drop sizes, that rounding up yields two as the minimum. Real-world drop sizes vary, so the exact count depends on how much volume one drop actually represents, but conceptually you must use whole drops and aim for the smallest number that could meet the target.