• A. 63
• B. 36
• C. 35
• D. 53

Answer: Option B

Explanation:

• A. $a^2+b^2$
• B. $a^2-b^2$
• C. $\frac{{\left(a+b\right)}^2}{2}-\frac{{\left(a-b\right)}^2}{2}$
• D. ${\left(a+b\right)}^2+{\left(a-b\right)}^2$

Answer: Option A

Explanation:

• A. $a^2+b^2$
• B. $a^2-b^2$
• C. $\frac{{\left(a+b\right)}^2}{2}-\frac{{\left(a-b\right)}^2}{2}$
• D. ${\left(a+b\right)}^2+{\left(a-b\right)}^2$

Answer: Option A

Explanation:

• A. $a^2+b^2$
• B. $a^2-b^2$
• C. $\frac{{\left(a+b\right)}^2}{2}-\frac{{\left(a-b\right)}^2}{2}$
• D. ${\left(a+b\right)}^2+{\left(a-b\right)}^2$

Answer: Option A

Explanation:

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

Answer: Option D

Explanation:

• A. $\frac{1}{2}\left(x-4\right)\left(x+2\right)$
• B. $\frac{1}{2}\left(x+4\right)\left(x-2\right)$
• C. $\frac{1}{2}\left(x+4\right)\left(x+2\right)$
• D. $\frac{1}{2}\left(x-4\right)\left(x-2\right)$

Answer: Option D

Explanation:

• A. $\frac{1}{30}$
• B. $\frac{1}{60}$
• C. $\frac{1}{15}$
• D. কোনোটিই নয়

Answer: Option C

Explanation:

• A. π ঘন মি.
• B. $\frac{\mathrm{\pi }}{3}$ঘন মি.
• C. $\frac{\mathrm{\pi }}{9}$ঘন মি.
• D. $\frac{\mathrm{\pi }}{27}$ঘন মি.

Answer: Option D

Explanation:

• A. 45
• B. 81
• C. 90
• D. 135

Answer: Option D

Explanation:

• A. 45
• B. 81
• C. 90
• D. 135

Answer: Option D

Explanation:

• A. $S_{\infty }= \frac{20}{3}$
• B. $S_{\infty }= \frac{3}{20}$
• C. $S_{\infty }= 20$
• D. $S_{\infty }= 3$

Answer: Option B

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{2}{8}$
• C. $\frac{3}{8}$
• D. $\frac{2}{4}$

Answer: Option C

Explanation:

• A. ৪%
• B. ৫%
• C. $৪\frac{১}{২}\%$
• D. $৫\frac{১}{২}\%$

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. 1
• B. 2
• C. 4
• D. 7.52

Answer: Option D

Explanation: