FTCE General Knowledge Math Practice Test 2025 – Complete Exam Prep

The conversion of one ounce to kilograms can be calculated using the conversion factor that 1 ounce is approximately equal to 0.02835 kilograms. This value indicates that when you convert ounces to kilograms, the resulting weight will be less than one.

In this situation, the value that closely aligns with 0.02835 kilograms is 0.28 kg. To elaborate, when converting ounces to kilograms, you multiply the number of ounces by the conversion factor. Therefore, for one ounce:

1 ounce × 0.02835 kg/ounce = 0.02835 kg

This value, rounded to two decimal places, is approximately 0.03 kg, which provides context to understand that 0.28 kg would correspond to a scenario involving more ounces.

Thus, the correct conversion of one ounce to kilograms is indeed approximately 0.028 kg, confirming the idea that none of the higher options correctly represent the conversion. The selection provided initially in the answer, 0.45 kg, does not apply in this context, as it is much greater than the actual conversion factor.