Texas Holdem Showdown Quiz

Board:
Hands:     
who has the best hand ?
9,10  A,A  tie
Board:
Hands:     
who has the best hand ?
  9,Q  5,5  tie
Board:
Hands:     
who has the best hand ?
  A,A  9,9  tie
Board:  
Hands:     
who has the best hand ?
  A,A  K,K  6,10