• A. $21$
• B. $31$
• C. $41$
• D. $51$

Answer: Option B

Explanation:

• A. $\left(6-a\right)\left(4a+1\right)$
• B. $\left(a-6\right)\left(4a+1\right)$
• C. $\left(a-6\right)\left(4a-1\right)$
• D. $\left(6-a\right)\left(4a-1\right)$

Answer: Option A

Explanation:

• A. $১৬$
• B. $৪$
• C. $৮$
• D. $৩২$

Answer: Option B

Explanation:

• A. $x\le 2$
• B. $x\ge 2$
• C. $x\le -2$
• D. $x\ge -2$

Answer: Option D

Explanation:

• A. $\sqrt[n]{a^m}$
• B. $\sqrt[mn]{a^m}$
• C. $\sqrt[n]{a^{mn}}$
• D. $\sqrt[mn]{a^n}$

Answer: Option A

Explanation:

• A. $32$
• B. $40$
• C. $48$
• D. $80$

Answer: Option B

Explanation:

• A. $3$
• B. $7$
• C. $5$
• D. $9$

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

• A. $1$
• B. $2$
• C. $3$
• D. কোনটিই নয়

Answer: Option A

Explanation:

• A. $0$
• B. $1$
• C. $2$
• D. $12$

Answer: Option B

Explanation:

• A. $b$
• B. $a$
• C. $a-b$
• D. $a^2-b^2$

Answer: Option A

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{2}{3}$
• C. $\frac{3}{4}$
• D. $\frac{5}{7}$

Answer: Option A

Explanation:

• A. $x^2$
• B. $x$
• C. $1$
• D. $0$

Answer: Option B

Explanation:

• A. $1$
• B. $1/2$
• C. $1/4$
• D. $2$

Answer: Option D

Explanation:

• A. $x=\frac{2}{7}$
• B. $x=\frac{7}{2}$
• C. $x=2$
• D. $x=7$

Answer: Option B

Explanation: