Chapter 1.1, Problem 1E

Which of the following are propositions? Give the truth value of each proposition.

1. What time is dinner?
2. It is not the case that $\pi$ is not a rational number.
3. $x/2$ is a rational number.
4. $2x+3y$ is a real number.
5. Either $\pi$ is rational and 17 is a prime, or $7<13$ and 81 is a perfectsquare.
6. Either 2 is rational and $\pi$ is irrational, or $2\pi$ is rational.
7. Either $5\pi$ is rational and 4.9 is rational, or there are exactly four primesless than 10.
8. $-3.7$ is rational, and either $3\pi <10$ or $3\pi >15.$
9. It is not the case that 39 is prime, or that 64 is a power of 2.
10. There are more than three false statements in this book, and this statementis one of them.