• A. 11
• B. 13
• C. 14
• D. 15

Answer: Option D

Explanation:

• A. $30°$
• B. $75°$
• C. $105°$
• D. $135°$

Answer: Option D

Explanation:

• A. 3
• B. 4
• C. 5
• D. 6

Answer: Option D

Explanation:

• A. ${\left(-1\right)}^{r}r{x}^r$
• B. $\left(r+1\right)x^{r+1}$
• C. $\left(r+1\right)x^r$
• D. ${\left(-1\right)}^r\left(r+1\right)x^r$

Answer: Option D

Explanation:

• A. 28
• B. 36
• C. 42
• D. 44

Answer: Option C

Explanation:

• A. ${}^{n}C_2$
• B. $\frac{{}^{n}C_2}{2!}$
• C. ${}^{n}C_2-2$
• D. ${}^{n}C_2-n$

Answer: Option D

Explanation:

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

Answer: Option D

Explanation:

• A. 1106.8 m
• B. 1200 m
• C. 1650 m
• D. 550.50 m

Answer: Option A

Explanation:

• A. ১৫
• B. ২০
• C. ৪৫
• D. ৬০

Answer: Option A

Explanation:

• A. ৯৯/১৩
• B. ১৯/৩৯
• C. ৩১/২০
• D. ২০/৩২

Answer: Option B

Explanation:

• A. ২৫
• B. ৩৫
• C. ৪৫
• D. ৫৫

Answer: Option B

Explanation:

• A. 3
• B. 1
• D. 2

Answer: Option B

Explanation:

• A. 6!
• B. 6!/(2!3!)
• C. 7!/2!
• D. 9!/(3!2!)

Answer: Option A

Explanation:

• A. 16 ft
• B. 32√3 ft
• C. 16√3 ft
• D. 32 ft

Answer: Option C

Explanation:

• A. ±(1+i
• B. ) 1-i
• C. -1
• D. -1+i

Answer: Option A

Explanation: