• A. $\pi r$
• B. $\pi r^2$
• C. $\pi r^3$
• D. $2r$

Answer: Option B

Explanation:

• A. V = 4 πrh
• B. $V={\mathrm{\pi r}}^2\mathrm{h}$
• C. V = 4 πrh
• D. $V=2{\mathrm{\pi r}}^2\mathrm{h}$

Answer: Option B

Explanation:

• A. $a^2-b^2=\left(a+b\right)\left(a-b\right)$
• B. $a^2+b^2={\left(a+b\right)}^2 -2ab$
• C. $a^2+b^2={\left(a-b\right)}^2 +2ab$
• D. ${\left(a+b\right)}^2={\left(a-b\right)}^2 +4ab$

Answer: Option C

Explanation:

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

Answer: Option B

Explanation:

• A. $১৬\frac{১}{৪}\%$
• B. $১৬\frac{২}{৩}\%$
• C. $৬\frac{২}{৩}\%$
• D. $৬\frac{১}{২}\%$

Answer: Option B

Explanation:

• A. $৬\frac{১}{২}\%$
• B. $৪\frac{১}{২}\%$
• C. $৬\frac{১}{৪}\%$
• D. $৪\frac{১}{৩}\%$

Answer: Option C

Explanation:

• A. 20 °
• B. $22\frac{1^{°}}{2}$
• C. ${23}^{°}$
• D. $23\frac{1^{°}}{2}$

Answer: Option B

Explanation:

• A. $y : \frac{1}{x}$
• B. $\sqrt{y} : \frac{1}{\sqrt{x}}$
• C. $\frac{1}{x} : \frac{1}{y}$
• D. $x : y$

Answer: Option D

Explanation:

• A. $DP=\frac{TR}{TP}$
• B. $DP=\frac{TP}{TA}$
• C. $DP=\frac{TD}{TR}$
• D. $DP=\frac{TD}{TA}$

Answer: Option B

Explanation:

• A. $\frac{২৫}{৯}$
• B. $\frac{৭}{২২}$
• C. $\frac{২২}{৭}$
• D. $\frac{৫}{৩}$

Answer: Option C

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{১৫}{১৭}$
• B. $\frac{১১}{১৫}$
• C. $\frac{৭৫}{৮৩}$
• D. $\frac{১০}{১১}$

Answer: Option D

Explanation:

• A. $\frac{২৩}{৩০}$
• B. $\frac{১৩}{১৫}$
• C. $\frac{৪}{৫}$
• D. $\frac{২}{৩}$

Answer: Option B

Explanation:

• A. $১৯\frac{১}{২}$
• B. $১৬\frac{১}{২}$
• C. $১৭\frac{১}{২}$
• D. $১৮\frac{৩}{৪}$

Answer: Option D

Explanation:

• A. $৪\frac{৩}{৪}$
• B. $১১\frac{১}{২}$
• C. ১০
• D. ১২

Answer: Option B

Explanation: