• A. $1$
• B. $2^{n+1}$
• C. $3$
• D. $2^n$

Answer: Option B

Explanation:

• A. স্বাভাবিক সংখ্যা
• B. পূর্ণ সংখ্যা
• C. মূলদ সংখ্যা
• D. অমূলদ সংখ্যা

Answer: Option D

Explanation:

• A. মূলদ সংখ্যা
• B. অমূলদ সংখ্যা
• C. জটিল সংখ্যা
• D. কাল্পনিক সংখ্যা

Answer: Option B

Explanation:

• A. - 1
• B. 7
• C. 1
• D. - 7

Answer: Option B

Explanation:

• A. $\frac{1}{9}$
• B. $\frac{1}{3}$
• C. $\frac{1}{27}$
• D. $\sqrt{3}$

Answer: Option C

Explanation:

• A. -1
• C. -9
• D. 9

Answer: Option D

Explanation:

• A. $8$
• B. $2$
• C. $15$
• D. $10$

Answer: Option C

Explanation:

• A. $\left(2y^2+6y+2\right)\left(y^2-3y+1\right)$
• B. $\left(2y^2-7y+1\right)\left(2y^2+7y+1\right)$
• C. $\left(2y^2+3y+1\right)\left(y^2-3y+1\right)$
• D. $2\left(y^2+3y+1\right)\left(y^2-3y+1\right)$

Answer: Option C

Explanation:

• A. $\left(x-3\right)\left(2x-5\right)$
• B. $\left(x+3\right)\left(2x+5\right)$
• C. $\left(x+3\right)\left(2x-5\right)$
• D. $\left(x-3\right)\left(2x+5\right)$

Answer: Option B

Explanation:

• A. (x-3)(2x-5)
• B. $\left(x+3\right)\left(2x+5\right)$
• C. $\left(x+3\right)\left(2x-5\right)$
• D. $\left(x-3\right)\left(2x+5\right)$

Answer: Option B

Explanation:

• A. $\sqrt{21}N$
• B. $\sqrt{19}N$
• C. $\sqrt{13}N$
• D. $\sqrt{23}N$

Answer: Option C

Explanation:

• A. -5
• C. 2
• D. 4

Answer: Option B

Explanation:

• A. $\left(2x+3y\right)\left(2x-3y\right)$
• B. $\left(2x-3y\right)\left(x+3y\right)$
• C. $\left(x+3y\right)\left(2x-2y\right)$
• D. $\left(2x+3y\right)\left(2x+2y\right)$

Answer: Option A

Explanation:

• A. $\left(2x+1\right)\left(x-3\right)$
• B. $\left(x-1\right)\left(2x+3\right)$
• C. $\left(x+1\right)\left(2x-3\right)$
• D. $\left(2x-1\right)\left(x+3\right)$

Answer: Option C

Explanation:

• A. (2x-3)(x+1)
• B. (2x-3)(x-1)
• C. (2x+3)(x+1)
• D. (2x+3)(x-1)

Answer: Option A

Explanation: