• A. $r=x\left(1\pm \sqrt{2}\right)$

Answer: Option A

Explanation:

• A. db
• B. nm
• C. ml
• D. cm

Answer: Option A

Explanation:

• A. 2
• B. 1
• C. 3
• D. 4

Answer: Option A

Explanation:

• A. ১০
• B. ২০
• C. ১৫
• D. ২৫

Answer: Option C

Explanation:

• A. $\frac{\sqrt{3}}{2}a$
• B. $\frac{\sqrt{3}}{2}{a}^2$
• C. $\frac{\sqrt{3}}{4}a$
• D. $\frac{\sqrt{3}}{1}{a}^2$

Answer: Option C

Explanation:

• A. 0,2
• B. 1,1
• C. -1,3
• D. -3,-4

Answer: Option B

Explanation:

• A. 1
• B. 2
• C. 3
• D. 4

Answer: Option C

Explanation:

• A. $1$
• B. $2$
• C. $-2$
• D. $4$

Answer: Option B

Explanation:

• A. $2$
• B. $1$
• C. $3$
• D. $5$

Answer: Option A

Explanation:

• A. $1$
• B. $2$
• C. $-2$
• D. $4$

Answer: Option B

Explanation:

• A. $\frac{5}{6}$
• B. $\frac{12}{10}$
• C. $\frac{4}{3}$
• D. $\frac{25}{17}$

Answer: Option A

Explanation:

• A. ৬৪৩
• B. ০.৬৪৩
• C. ০.০৬৪৩
• D. ৬৪.৩

Answer: Option D

Explanation:

• A. ৩৬ ইঞ্চি
• B. ৩৬ বর্গ ইঞ্চি
• C. ৩ ফুট
• D. ৩ বর্গফুট

Answer: Option B

Explanation:

• A. $\frac{a+b}{2}$
• B. $\frac{ap+bq}{2}$
• C. $\frac{ap+bq}{p+q}$
• D. $\frac{ap+bq}{a+b}$

Answer: Option C

Explanation:

• A. ২১
• B. ২০
• C. ১১
• D. ৯

Answer: Option B

Explanation: