1. Invitations were sent to 96 relatives for a family get-together. Only 88 relatives came. How many relatives did not come?   2. Ronnie weighs 20 kg. His mother is 55 kg. How much more is his mother's weight (in kg)?   3. Mr. Gates will be 43 next year. His son is 30 years younger than him. How many years old is his son at present?   4. A family party has 34 adults, 18 boys, and 10 girls. How many more adults are there at the party than children?   5. Peter is 14 years old. His aunt is 39. How many years older than him is his aunt?