• A. 30
• B. 60
• C. 200
• D. 420

Answer: Option B

Explanation:

• A. $9$
• B. $18$
• C. $19$
• D. $27$

Answer: Option A

Explanation:

• A. $3$
• B. $2$
• C. $1$
• D. $0$

Answer: Option C

Explanation:

• A. $0$
• B. $\sqrt{3}$
• C. $3\sqrt{3}$
• D. $1$

Answer: Option B

Explanation:

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

Answer: Option D

Explanation:

• A. $8$
• B. $6$
• C. $4$
• D. $2$

Answer: Option C

Explanation:

• A. $10:12$
• B. $9:10$
• C. $3:5$
• D. $1:2$

Answer: Option D

Explanation:

• A. $3:24:8$
• B. $18:24:32$
• C. $12:24:28$
• D. $16:24:32$

Answer: Option B

Explanation:

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

Answer: Option D

Explanation:

• A. $4$
• B. $2$
• C. $1$
• D. $0$

Answer: Option D

Explanation:

• A. $\left(1-x\right)\left(1-7x\right)$
• B. $\left(1+x\right)\left(1+7x\right)$
• C. $\left(1+x\right)\left(1-7x\right)$
• D. $\left(1-x\right)\left(1+7x\right)$

Answer: Option D

Explanation:

• A. $37$
• B. $27$
• C. $47$
• D. $17$

Answer: Option C

Explanation:

• A. $2$
• B. $3x$
• C. $xz$
• D. $1$

Answer: Option D

Explanation:

• A. $2ab$
• B. $24ab$
• C. $36ab$
• D. $144ab$

Answer: Option B

Explanation:

• A. $4$
• B. $6$
• C. $8$
• D. $12$

Answer: Option B

Explanation: