The Brain Teaser: Scroll Down for your Solution
1. A racing driver drove around a 6-mile track at 140 miles per hour for 3 miles, 168 miles per hour for 1.5 miles, and 210 miles per hour for 1.5 miles. What was his average speed for the entire 6 miles?
2. A girl is twice as old as her brother and half as old as her father. In 22 years, her brother will be half as old as his father. How old is the daughter now?
1. 160 miles per hour.
2. She is 22. Her brother is 11 and her father is 44. In 22 years, her brother would be 33 and their father would 66.