1. Invitations were sent to 18 relatives for a family get-together. Only 10 relatives came. How many relatives did not come?   2. Arthur weighs 24 kg. His mother is 59 kg. How much more is his mother's weight (in kg)?   3. Mr. Hick 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 47 adults, 4 boys, and 19 girls. How many more adults are there at the party than children?   5. Jimmy is 16 years old. His aunt is 43. How many years older than him is his aunt?