1. Invitations were sent to 96 relatives for a family get-together. Only 71 relatives came. How many relatives did not come?   2.  There are five members in Jack's family. Their total weight is 255 kg. His own weight is 32 kg. How many kilograms do the other four members weigh?   3. Mr. Young will be 73 next year. His son is 34 years younger than him. How many years old is his son at present?   4. A family party has 143 adults, 25 boys, and 21 girls. How many more adults are there at the party than children?   5. For Christmas, Mr. Stewart gave $127 to his two sons. He gave $81 to the elder son. How many dollars did he give the younger son?