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

Answer: Option D

Explanation:

• A. $\frac{x+p}{y+q}$
• B. $\frac{x+p}{{\displaystyle \frac{x}{y}}+{\displaystyle \frac{p}{q}}}$
• C. $\frac{xy+pq}{y+q}$
• D. $\frac{xy+pq}{{\displaystyle \frac{x}{y}}+{\displaystyle \frac{p}{q}}}$

Answer: Option B

Explanation:

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

Answer: Option D

Explanation:

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

Answer: Option B

Explanation:

• A. $\sqrt{-3}$
• C. $\sqrt{3}$
• D. $\sqrt{\frac{2}{3}}$

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• A. $y^2=ax$
• B. $x^2+y^2=16$
• C. $ax+bx+c=0$
• D. $y^2=2x+7$

Answer: Option B

Explanation:

• A. $\frac{১}{১৫}$
• B. $\frac{৩}{১০}$
• C. $\frac{২}{১৫}$
• D. $\frac{১}{১০}$

Answer: Option B

Explanation:

• A. $\frac{a^2}{2}$ব.মি.
• B. $2a^2$ব.মি.
• C. $a^2$ব.মি.
• D. $\frac{a^2}{4}$ব.মি.

Answer: Option A

Explanation:

• A. $১{২}^{৪}$
• B. $১{১}^{৪}$
• C. $১{০}^{৪}$
• D. ${৯}^{৪}$

Answer: Option B

Explanation:

• 
• A. ৬
• B. ১০
• C. ১১
• D. ১২

Answer: Option D

Explanation:

• A. $\frac{A_1\left(P+Q\right)+A_2\left(X+Y\right)}{4}$
• B. $\frac{P+Q}{2}+\frac{X+Y}{2}$
• C. $\frac{A_1+A_2}{2}$
• D. $\frac{A_1+A_2}{4}$

Answer: Option C

Explanation:

• A. p টি
• B. $\frac{m^2}{p}$
• C. $\frac{m}{p^2}$
• D. mp টি

Answer: Option B

Explanation:

• A. $3\frac{1}{8}$ লাভ
• B. $12\frac{1}{2}$ লাভ
• C. $1\frac{3}{8}$ ক্ষতি
• D. $8\frac{1}{3}$ ক্ষতি

Answer: Option D

Explanation: