• A. $2\mathrm{\pi r}$
• B. $\frac{4}{3}{\mathrm{\pi r}}^2$
• C. $4{\mathrm{\pi r}}^2$
• D. ${\mathrm{\pi r}}^2$

Answer: Option D

Explanation:

• A. $০.৩$
• B. $\sqrt{০.৩}$
• C. $\frac{১}{৩}$
• D. $\frac{২}{৫}$

Answer: Option A

Explanation:

• A. $\mathrm{\pi }$
• B. $\sqrt{2}$
• C. $\sqrt{11}$
• D. সবগুলো

Answer: Option D

Explanation:

• A. $\sqrt{\frac{১৬}{৯}}$
• B. $\sqrt{\frac{৪}{২}}$
• C. $\sqrt{৪৯}$
• D. $\sqrt{\frac{৬৪}{২৬}}$

Answer: Option D

Explanation:

• A. ${\sin }^{2}A+{\cos }^{2}B=1$
• B. $\sin \theta +\cos \theta >1$
• C. ${\tan }^2-{\sec }^2=1$
• D. $\sin \theta +\cos \theta <1$

Answer: Option B

Explanation:

• A. $\frac{\sqrt{2}+\sqrt{3}}{2}$
• B. $\frac{\sqrt{2}.\sqrt{3}}{2}$
• C. 1.5
• D. 1.8

Answer: Option C

Explanation:

• A. $3\sqrt{8}$
• B. $\sqrt{12}$
• C. $\sqrt{18}$
• D. $\sqrt{27}$

Answer: Option A

Explanation:

• A. $a>0,a\not\equiv 1$
• B. $a<0,a\not\equiv 1$
• C. $a>1,a\not\equiv 0$
• D. $a<1,av0$

Answer: Option A

Explanation:

• A. $\frac{৩৩}{৫০}$
• B. $\frac{৮}{১১}$
• C. $\frac{৩}{৫}$
• D. $\frac{১৩}{২৭}$

Answer: Option B

Explanation:

• A. 2/3
• B. 4/5
• C. 13/15
• D. 12/11

Answer: Option C

Explanation:

• A. $\frac{২}{৫}$
• B. $\frac{৪}{৯}$
• C. $\frac{১}{৩}$
• D. $\frac{৩}{৭}$

Answer: Option C

Explanation:

• A. $\frac{1}{3}$
• B. $\frac{3}{6}$
• C. $\frac{2}{7}$
• D. $\frac{5}{21}$

Answer: Option D

Explanation:

• A. $\sqrt{2}$
• B. $\frac{1}{2\left(\sqrt{5-\sqrt{3}}\right)}$
• C. $\frac{1}{\sqrt{5}}+\frac{1}{\sqrt{3}}$
• D. $\frac{2}{\sqrt{3}+\sqrt{5}}$

Answer: Option D

Explanation:

• A. ২, ৩, ৫ সে. মি.
• B. ৪, ৫, ৬ সে. মি.
• C. ৫, ৬, ৮ সে. মি.
• D. ৩, ৫, ৭ সে. মি.

Answer: Option A

Explanation:

• A. ভাজ্য=(ভাজকxভাগফল)+ভাগশেষ
• B. ভাজ্য= (ভাজক+ভাগশেষ) +ভাগফল
• C. ভাজ্য=(ভাগশেষxভাগফল) + ভাজক
• D. কোনটিই নয়

Answer: Option D

Explanation: