at the same age 还是in the same age?

at the same age 还是in the same age?
at the same age 还是in the same age?

at the same age 还是in the same age?
at the same age
派生于：at the age of / at one's age of

at the same age

AT

好早的问题了，因为我现在刚好碰到，就说一下。
下面的答案都不对。
这要看具体情况，有时是既不用at也不用in的。比如说The are the same age.