1.  Which of the following statements is not correct?
A. log10 10 = 1
B. log (2 + 3) = log (2 x 3)
C. log10 1 = 0
D. log (1 + 2 + 3) = log 1 + log 2 + log 3

2.  If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:
A. 2.870
B. 2.967
C. 3.876
D. 3.912

3. 
log 8 is equal to:
log 8
A.
1
8
B.
1
4
C.
1
2
D.
1
8

4. 
If log a + log b = log (a + b), then:
b a
A. a + b = 1
B. a - b = 1
C. a = b
D. a2 - b2 = 1

5.  If log 27 = 1.431, then the value of log 9 is:
A. 0.934
B. 0.945
C. 0.954
D. 0.958