con thứ mấy

Meaning

1. which child

   question word

   which child (in birth order)

   In the South the eldest child is called Hai, "two", so Southern family numbers start at two.

   • Anh là con thứ mấy?

     Where do you come in your family?

   • Chị là con thứ mấy trong nhà?

     Where do you come among the children in your family?