• A. $x-5$
• B. $x-6$
• C. $x^2+x+3$
• D. $x^2-x-3$

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

• A. $x-y$
• B. $x+y$
• C. $12\left(x^2-y^2\right)$
• D. $2$

Answer: Option D

Explanation:

• A. $3$
• B. $1$
• C. $2$
• D. $4$

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• A. $x-5$
• B. $x-6$
• C. $x^2+x+3$
• D. $x^2-x-3$

Answer: Option A

Explanation:

• A. $5:11$
• B. $6:5$
• C. $5:6$
• D. $3:8$

Answer: Option A

Explanation:

• A. $a^2-b^2$
• B. $a-b$
• C. ${\left(a+b\right)}^2$
• D. $a+b$

Answer: Option D

Explanation:

• A. $7$
• B. $\frac{10}{7}$
• C. $3$
• D. $\frac{7}{10}$

Answer: Option B

Explanation:

• A. 16
• B. 12
• C. 10
• D. 9

Answer: Option B

Explanation:

• A. 12
• B. 10
• C. 6
• D. None of them

Answer: Option A

Explanation:

• A. 9
• B. 18
• C. 27
• D. 36

Answer: Option D

Explanation:

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

Answer: Option D

Explanation:

• A. $a\left(a-3\right)$
• B. $a-3$
• C. $a$
• D. $a\left(a+3\right)$

Answer: Option A

Explanation:

• A. $5$
• B. $10$
• C. $15$
• D. $20$

Answer: Option B

Explanation: