Birth Numbers riddle:

Take the difference between my numbers and find the balancing number between each pole. Thus: between nine and three is SIX.
OK? Now..what would be my balancing numbers?

   9  ?  5
   ?  ?  ?
   3  ?  9

What would be Kat's?
   6  ?  7
   ?  ?  ?
   4  ?  8

Clue?
My two nines balance each other

ANSWER

BACK TO TORTOISE 4