Every century means every 100 years
An event that occurs once every three years.
I assume you mean every four years and yes it is held every four years
The word Biennial means Every two years
Oh, dude, you mean besides my existential crisis? Ha, just kidding. The Olympics happen every 4 years, so I guess you're looking for something that happens more often. How about the World Choir Games? They happen every 2-3 years, so there you go, a fun fact for your next trivia night.
Every 2 years
I think they take place every 3 years..... I'm not sure, srry
every 3 years
every 3 months
Annually mean every year.
3 years
The mean is the average. To get an average age of three, 3 of her pets would have to 4 years old and the other 3 would be 2 years old. In ten years she would have 3 pets that are 14 and three that are 12, therefore the mean age of them would be= [(14*3)+ (12*3)]/6= 13 So in following the same concept, 20 years the mean age of her pets would be 23.