hi closetoyou,
just to echo what roi g mentioned, sometimes there are no direct translation of tagalog sentences into english (and you just proved it, didn't you?).
"pang-ilang anak ka?" if translated directly to english would sound awkward!
my suggestion is to invert the question to a 'direct YES-NO question':
"are you the first (for instance) child of your parents?"
"no!"
"2nd?"
"no"
"oh, you must be the third child, aren't you?"
"yes!"
by the way, Kabayan, keep up on this site. I'm sure you would enjoy it!
:)