GED Math Practice Test

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How many ounces are in one gallon?

128 ounces
16 ounces
32 ounces
64 ounces

The correct answer is: 128 ounces

The correct answer is that there are 128 ounces in one gallon. This is based on the standard conversion where one gallon is defined as being equivalent to 128 fluid ounces. In understanding this relationship, it helps to remember that there are 4 quarts in a gallon and each quart contains 32 ounces. Thus, if you multiply the number of quarts (4) by the number of ounces in each quart (32), you arrive at the total of 128 ounces in a gallon. Understanding these fluid measurements is crucial, especially in contexts like cooking, where accurate measurements can significantly affect recipe outcomes.