Which statement about decades is true?

Which statement about decades is true?

• A. A decade equals twenty years
• B. A decade equals ten years
• C. A decade equals five years
• D. A decade equals one hundred years

Answer: (B)

Understanding decades means recognizing a decade as a ten-year block. That’s the standard definition used across history, research, and everyday language to describe 10-year spans. For example, the decade of the 1990s spans ten years, from 1990 through 1999. The other options don’t fit because twenty years is two decades, five years is half a decade, and one hundred years is a century. So, a decade equals ten years.

Understanding decades means recognizing a decade as a ten-year block. That’s the standard definition used across history, research, and everyday language to describe 10-year spans. For example, the decade of the 1990s spans ten years, from 1990 through 1999. The other options don’t fit because twenty years is two decades, five years is half a decade, and one hundred years is a century. So, a decade equals ten years.