When is person A and person B's joint 100th birthday?
January 13, 2015 4:23 AM Subscribe
I have two friends, person A and person B. Person A was born 4 February 1971, so will be 44 soon. Person B was born 29 March 1959 and will be 56 soon. Until 4 February 2016 they will then collectively be 100 years old. But on what date between those two birthdays could they be considered exactly 100?. I want to send a joint 100th birthday card and I think, but I'm not sure, that it's the 2 or 3 March.