its 100 years that make up a century.. similarly 50 years is called an half century.
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.
Twenty years
2 years
ten years in a decade
A century is 100 years.
Ten YEARS make a decade. A decade is larger than a yeaR
its 10 years
1,000 years makes up a millenuim
It's the other way around - how many light yearsmake up a parsec? The answer is: 3.26 light years make up one parsec.
Make 7 Up Yours!
365 days make one year, except in leap years (every four years) when there are 366 days.