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.
$${\text{If}}\,{\text{log}}\frac{a}{b} + {\text{log}}\frac{b}{a} = {\text{log}}(a + b),$$      then: