II. Solve the following proble ms compre he ns ive ly. Show all your solutions us ing Polya's 4 step strategy.

6. John's brother is 3 years older than him. His father was 28 years old when his sister was born, while his mother was 26 years old when he was born. If his sister was 4 years old when his brother was born, what are the ages of John's father and mother respectively when his brother was born? 7. The elimination stage of the UAAP women's volleyball competition is played in the two rounds where each competing team plays against each other teams once in every round. How many games are played in the elimination round if there are eight teams in a given season? B. W ally asked Joy how old she was. Joy said to him that she would give him three clues and see if he could guess her age. Joy wrote down the clues and let W ally make a guess. a. My age is between 18 and 35 b. My age is a mult ip le of 3. c. My age is an odd number. d. The digits of my age are repeated. How old is Joy? 9. Mary is 24 years old. Mary is twice as old as Ana was when Mary was old as Ana is now. How old is Ana? 10. Three persons can do a piece of work alone in 3 hours, 4 hours and 6 hours respectively. What fraction of the job can they finis h in one hour working together