its 100 years that make up a century.. similarly 50 years is called an half century.
A century is 100 years.
Ten YEARS make a decade. A decade is larger than a yeaR
2000-2099
1600-1699
The 20th century began in 1901 and ended in 2000
The 12th century was the years 1101 through 1200. That means that it was at least 814 years ago, up to 913 years ago, as of 2014.
25 !
Seconds make up minutes which make up hours which make up days which make up weeks which make up months which make up years. That's like asking how many meters make up an inch- it doesn't work, because a second is smaller.
2 years
ten years in a decade
Twenty years
Decade =10 years