• A. $\sqrt{21}N$
• B. $\sqrt{19}N$
• C. $\sqrt{13}N$
• D. $\sqrt{23}N$

Answer: Option C

Explanation:

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

Answer: Option C

Explanation:

• A. $21$
• B. $31$
• C. $41$
• D. $51$

Answer: Option B

Explanation:

• A. $6:8$
• B. $8:3$
• C. $5:6$
• D. $3:8$

Answer: Option B

Explanation:

• A. $8:3$
• B. $5:6$
• C. $3:8$
• D. $6:4$

Answer: Option A

Explanation:

• A. $2:3$
• B. $3:2$
• C. $2:1$
• D. $1:2$

Answer: Option C

Explanation:

• A. 1
• B. 2
• C. -1
• D. 0.45

Answer: Option D

Explanation:

• A. $2^{n+1}$
• B. $2^{n-1}$
• C. $-2$
• D. $4$

Answer: Option C

Explanation:

• A. 5
• B. $x$
• C. $\frac{x}{2}$
• D. $2-x$

Answer: Option A

Explanation:

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

Answer: Option D

Explanation:

• A. $0$
• B. $1$
• C. $2$
• D. $3$

Answer: Option D

Explanation:

• A. $\frac{( x + 4 ) ( 2 - y )}{8 x y}$
• B. $\frac{( x - 2 ) ( y - 4 )}{8 x y}$
• C. $\frac{( x - 4 ) ( y - 2 )}{8 x y}$
• D. $\frac{( x + 2 ) ( 4 - y )}{8 x y}$

Answer: Option C

Explanation:

• A. ০.০০১
• B. ০.০১
• C. ০.১
• D. ১

Answer: Option C

Explanation:

• A. ৫৫০
• B. ২০০
• C. ১২০
• D. ৬৬০

Answer: Option D

Explanation:

• A. $\frac{৩}{৫}$
• B. $\frac{২}{৫}$
• C. $\frac{৩}{৮}$
• D. $\frac{১}{৫}$

Answer: Option D

Explanation: