• A. 8
• B. 2
• C. 15
• D. 10

Answer: Option C

Explanation:

• A. $\frac{7}{3}$
• B. $3$
• C. $\frac{8}{3}$
• D. $2$

Answer: Option D

Explanation:

• A. ${\log }^2$
• B. ${\log }^3$
• C. ${\log }^5$
• D. ${\log }^7$

Answer: Option A

Explanation:

• A. log 30
• B. log 40
• C. 3 log 7
• D. log 13

Answer: Option B

Explanation:

• A. $\sqrt{5}$
• B. $\frac{2}{3}$
• C. $\frac{3}{2}$
• D. $5$

Answer: Option C

Explanation:

• A. ${\log }^8$
• B. ${\log }^{27}$
• C. ${\log }^5$
• D. ${\log }^{10}$

Answer: Option B

Explanation:

• A. $\log 8$
• B. $\log 27$
• C. $\log 5$
• D. $\log 10$

Answer: Option B

Explanation:

• A. $4$
• B. $4i$
• C. $-4$
• D. $-4i$

Answer: Option C

Explanation:

• A. ${\log }_{a}m-{\log }_{a}n$
• B. ${\log }_{a}m+{\log }_{a}n$
• C. ${\log }_{a}m\times {\log }_{a}n$
• D. কোনটিই নয়

Answer: Option A

Explanation:

• A. $a>0,a\not\equiv 1$
• B. $a<0,a\not\equiv 1$
• C. $a>1,a\not\equiv 0$
• D. $a<1,av0$

Answer: Option A

Explanation:

• A. a>0
• B. $a\not\equiv 1$
• C. $a\not\equiv 0,a>1$
• D. $a>0,a\ne 1$

Answer: Option D

Explanation:

• A. $1$
• B. $a$
• C. ${\log }_{a}1$
• D. $0$

Answer: Option D

Explanation:

• A. $4$
• B. $2$
• C. $-2$
• D. $-4$

Answer: Option A

Explanation:

• A. $\pm 3$
• B. $\pm \frac{1}{3}$
• C. $-3$
• D. $3$

Answer: Option D

Explanation:

• A. 3
• B. 2
• C. $\frac{1}{3}$
• D. $-\frac{1}{3}$

Answer: Option A

Explanation: