1.
Which of the following statements is not correct?

2.
If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:

3.
$${{\log \sqrt 8 } \over {\log 8}}$$ is equal to:

4.
If log 27 = 1.431, then the value of log 9 is:

5.
$${\rm{If}}\log {a \over b} + \log {b \over a} = \log \left( {a + b} \right),{\rm{then:}}$$