Which is not equal to 2 quarts? 2c, 4 pints, 1/2 gallon or 64 fluid oz.

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To determine which option is not equal to 2 quarts, let's first establish the equivalent measurements:

1 quart = 2 pints
1 pint = 2 cups

Now, let's compare the given options:

1) 2 cups (2c):
Since 1 pint is equivalent to 2 cups, 2 quarts would be equal to 4 cups. Therefore, 2 cups is not equal to 2 quarts.

2) 4 pints:
As mentioned earlier, 1 quart is equal to 2 pints. So, 2 quarts would be equal to 4 pints. Therefore, 4 pints is equal to 2 quarts.

3) 1/2 gallon:
1 gallon is equal to 4 quarts. Therefore, half a gallon would be equal to 2 quarts. Hence, 1/2 gallon is equal to 2 quarts.

4) 64 fluid ounces:
Since 1 quart is equal to 32 fluid ounces, 2 quarts would be equal to 64 fluid ounces. Therefore, 64 fluid ounces is equal to 2 quarts.

After evaluating each option, we find that the quantity "2 cups (2c)" is the only one that is NOT equal to 2 quarts.