Baby Math

As I was preparing for your class today, a friend of mine in Ireland emailed to say that his wife had given  birth to twin daughters. They don't have names yet, but here they are.

So the fact that they are twins gives us a chance to keep our math minds sharp! Here's a question for you to do at home, if we don't have time in class: In what year will the combined age of my friends' twins be the same as your age?

Since they were born yesterday, they'll obviously both be one next year, 2011, which means their combined age will be 2. And it will be 4 in 2012 when they'll both turn 2; 6 in 2013 (turning 3), 8 in 2014 (turning 4) and so on. But REMEMBER: you get a year older in all those years too.  So when will the two figures become the same?

When you answer in the comments, tell me what age you are now, so I can check if your answer is right.