• A. $x\sqrt{2}$
• B. $x\sqrt{3}$
• C. $2\sqrt{2x}$
• D. $\sqrt{x}$

Answer: Option A

Explanation:

• A. $\frac{1}{2}ah$ ব.মি
• B. $ah$ ব.মি
• C. $a^{2}h$ ব.মি
• D. $a^2{h}^2$ ব.মি

Answer: Option B

Explanation:

• A. $\frac{১০০\times সুদ}{হার \times আসল}$
• B. $\frac{১০০\times সুদ}{সময়\times আসল}$
• C. $\frac{সময়\times আসল}{হার \times আসল}$
• D. $\frac{১০০\times আসল}{সুদ\times সময়}$

Answer: Option B

Explanation:

• A. $2\sqrt{5}$
• B. $\sqrt{10}$
• C. $5\sqrt{2}$
• D. $3\sqrt{5}$

Answer: Option C

Explanation:

• A. $\mathrm{\pi }-4$
• B. $4-{\mathrm{\pi }}^2$
• C. $4-\mathrm{\pi }$
• D. $2-\mathrm{\pi }$

Answer: Option C

Explanation:

• A. $35\sqrt{5}$
• B. $40\sqrt{5}$
• C. $45\sqrt{5}$
• D. $50\sqrt{5}$

Answer: Option D

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{\theta }{360}{\mathrm{\pi r}}^2$
• B. $\frac{\theta }{90}{\mathrm{\pi r}}^2$
• C. $\frac{\theta }{210}{\mathrm{\pi r}}^2$
• D. $\frac{\theta }{180}{\mathrm{\pi r}}^2$

Answer: Option A

Explanation:

• A. $\left(a+b\right)h$
• B. $2\left(a+b\right)h$
• C. $\frac{1}{2}\times \left(a+b\right)\times h$
• D. $\frac{1}{2}\left(a-b\right)h$

Answer: Option C

Explanation:

• A. $\mathrm{\pi }$
• B. $\mathrm{\pi r}$
• C. $2$
• D. $2\mathrm{r}$

Answer: Option A

Explanation:

• A. $\sin \theta =1+{\cos }^2\theta$
• B. ${\sin }^2\theta =1-{\cos }^2\theta$
• C. ${\sin }^2\theta -{\cos }^2\theta =1$
• D. $\sin \theta =\frac{1}{\cos \theta }$

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• A. $1400x$ টি
• B. $\frac{1400}{100+x}$ টি
• C. $\frac{100+x}{1400}$ টি
• D. $\frac{1400+x}{100}$ টি

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

• A. $\frac{n\left(n+1\right)}{2}$
• B. $\frac{n^2{\left(n+1\right)}^2}{4}$
• C. $n^2$
• D. $\frac{n\left(n+1\right)\left(n+2\right)}{6}$

Answer: Option A

Explanation: