• 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. $\frac{1}{2}\times \left(a-b\right)\times h$

Answer: Option C

Explanation:

• A. $\frac{১}{৩}$
• B. $\frac{৭}{৮}$
• C. $\frac{৫}{৬০}$
• D. $\frac{৮}{২১}$

Answer: Option B

Explanation:

• A. 7
• B. 9
• C. 11
• D. 13

Answer: Option C

Explanation:

• A. $1$
• B. $0$
• C. অনির্ণেয়
• D. $2$

Answer: Option B

Explanation:

• A. ১,৮১,৫০০
• B. ১,৮৩,৪৩৩
• C. ১,৬০,০০০
• D. ১,২,৭৭৮৩

Answer: Option C

Explanation:

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

Answer: Option A

Explanation:

• A. 6
• B. 7
• C. -6
• D. -7

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. $b=ac$
• B. $c^2=ab$
• C. $b^2=ac$
• D. $b=ac$

Answer: Option C

Explanation:

• A. $0$
• B. $1$
• C. $x^2-y^2$
• D. $x+y$

Answer: Option B

Explanation:

• A. $x=a^n$
• B. $x=\ln x$
• C. $a=x^n$
• D. $x={\log }_{a}n$

Answer: Option D

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

• A. $0$
• B. $a$
• C. $1$
• D. অনির্নেয়

Answer: Option C

Explanation:

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

Answer: Option A

Explanation: