1. If Sam runs 2 miles in 1/3 of an hour, he runs 6 miles in an hour, so in 4/5 of an hour he runs 24/5 miles, or 4.8 miles. E is the correct answer.
2. With 568 books, 21 shelves will be completely filled before we have under 26 books left. We then have 22 books left, so the last shelf contains 22 books. B is the correct answer.
3. We can add 5 to both sides to get 20 < 2x, so we have 10 < x, or x > 10. D is the correct answer.
4. John is currently x+3 years old. In 6 years, he will be x+3+6=x+9 years old. E is the correct answer.
5. The corduroy suit now costs (100)(1-.05)=95 dollars, and the wool suit costs (300)(100+.1)=330 dollars. The sum is thus 425 dollars. D is the correct answer.