• A. $1$
• B. $\frac{1}{2}$
• C. $3$
• D. $2$

Answer: Option B

Explanation:

• A. $n_{c_{r+1}}$
• B. $n+1_{c_r}$
• C. $n+1_{c_{r+1}}$
• D. $n+1_{c_{r-1}}$

Answer: Option B

Explanation:

• A. $\sqrt{2\raisebox{1ex}{$7$}\!\left/ \!\raisebox{-1ex}{$7$}\right.}+\frac{5}{8}$
• B. $\frac{F}{2}$
• C. $\frac{F}{4}$
• D. $4F$

Answer: Option C

Explanation:

• A. -33
• B. 33
• C. -43
• D. 43

Answer: Option C

Explanation:

• A. $x(\frac{1}{t_1}+\frac{1}{t_2})$
• B. $x(\frac{1}{t_1}-\frac{1}{t_2})$
• C. $\frac{x}{2}(\frac{1}{t_1}+\frac{1}{t_2})$
• D. $\frac{x}{2}(\frac{1}{t_1}-\frac{1}{t_2})$

Answer: Option D

Explanation:

• A. $\left\{x\in \mathrm{ℝ}:x\ge \frac{1}{4}\right\}$
• B. $\left\{x\in \mathrm{ℝ}:x\le \frac{1}{4}\right\}$
• C. $\left\{x\in \mathrm{ℝ}:x<\frac{1}{4}\right\}$
• D. $\left\{x\in \mathrm{ℝ}:x\ge 4\right\}$

Answer: Option A

Explanation:

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

Answer: Option D

Explanation:

• A. $\frac{\mathrm{\pi }}{2}$
• B. $\frac{\mathrm{\pi }}{8}$
• C. $\frac{\mathrm{\pi }}{6}$
• D. $\frac{\mathrm{\pi }}{4}$

Answer: Option B

Explanation:

• A. 4
• B. 2
• C. 6
• D. in 6

Answer: Option D

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{1}{3}$
• C. $\frac{1}{4}$
• D. $1$

Answer: Option C

Explanation:

• A. ৫
• B. -৫
• C. $\frac{১}{৫}$
• D. $-\frac{১}{৫}$

Answer: Option C

Explanation:

• A. $1$
• B. $-\frac{1}{2}$
• C. $\frac{1}{2}$
• D. $-1$

Answer: Option D

Explanation:

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

Answer: Option A

Explanation:

• A. ৪ টি
• B. ৫ টি
• C. ৬ টি
• D. ৩ টি

Answer: Option B

Explanation:

• A. 4
• B. 8
• C. 5
• D. 3

Answer: Option C

Explanation: