1.  Invitations were sent to 79 relatives for a family gettogether. Only 71 relatives came. How many relatives did not come? 
  

2.  Herbert weighs 25 kg. His mother is 57 kg. How much more is his mother's weight (in kg)? 
  

3.  Mr. Lee will be 38 next year. His son is 29 years younger than him. How many years old is his son at present? 
  

4.  A family party has 39 adults, 4 boys, and 14 girls. How many more adults are there at the party than children? 
  

5.  Arthur is 13 years old. His aunt is 37. How many years older than him is his aunt? 
  
