• A. 1
• B. x
• C. (1-x)
• D. (1+x)

Answer: Option D

Explanation:

• A. 9
• B. 441
• C. 1
• D. 21

Answer: Option B

Explanation:

• A. $2$
• B. $1$
• C. $3$
• D. $5$

Answer: Option A

Explanation:

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

Answer: Option C

Explanation:

• A. $\tan z^2\theta$
• B. $2 {\cos }^2\frac{\theta }{2}$
• C. $2 \sin \theta \cos \theta$
• D. $\cos 2\theta$

Answer: Option C

Explanation:

• 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: