• 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. $\frac{২}{৩}$
• B. $\frac{৩}{৪}$
• C. $\frac{৫}{৯}$
• D. $\frac{৭}{১২}$

Answer: Option B

Explanation:

• A. $\frac{১১}{৩০}$
• B. $\frac{৯}{২০}$
• C. $\frac{৩৫}{৫}$
• D. $\frac{১১}{১৫}$

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{৫}{৯}$
• B. $\frac{৯}{৫}$
• C. $\frac{৩}{১১}$
• D. $\frac{১১}{৩}$

Answer: Option C

Explanation:

• A. $x^2+2y+5=0$
• B. $x^2+2y^2+5=0$
• C. $x^{}+2y^{}+5=0$
• D. $2x{y}^{}+5=0$

Answer: Option C

Explanation:

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

Answer: Option D

Explanation:

• A. $\frac{৪}{১৫}$ কি.মি.
• B. ২ কি.মি.
• C. $৩\frac{৩}{৪}$ কি.মি.
• D. ৪ কি.মি.

Answer: Option D

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{৩}{৪}$
• B. $\frac{৫}{৬}$
• C. $\frac{৭}{৯}$
• D. $\frac{৯}{১৩}$

Answer: Option D

Explanation: