What is the metric prefix for 1,000,000?

• A. Kilo or k
• B. Mega or M
• C. Giga or G
• D. Tera or T

Answer: (B)

The metric prefix for 1,000,000 is "Mega" which is denoted by the letter "M." This prefix signifies a factor of one million (10^6). In various scientific and engineering contexts, the use of the Mega prefix is common for expressing large quantities, such as in megabytes (MB) for data storage, where one megabyte equals 1,000,000 bytes.

The other prefixes available in the choices correspond to different magnitudes: "Kilo" represents 1,000 (10^3), "Giga" signifies 1,000,000,000 (10^9), and "Tera" indicates 1,000,000,000,000 (10^12). Each of these serves a specific purpose in measurement but does not apply to the figure of 1,000,000. Therefore, "Mega" accurately identifies the metric prefix that corresponds to this value.