One hundred years is defined as a century, so 150 years is one and a half centuries. This means that 150 years encompasses one complete century plus an additional fifty years.
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1 century= 100 years. 1 decade= 10 years. So: 100+ 10(5) (5 decades) = 150 years.
A century is 100 years.100 yearsThere are 100 years in a century.
There were 100 years in the 20th century.
A 100 years is a century
A period of 100 years is called a century.