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

Answer: Option B

Explanation:

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

Answer: Option D

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option A

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. $3$
• B. $1$
• C. $2$
• D. $4$

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

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

• A. 800
• B. 1200
• C. 1400
• D. 1000

Answer: Option D

Explanation:

• A. $6$
• B. $4$
• C. $1$
• D. $-1$

Answer: Option D

Explanation:

• A. $4$
• B. $3$
• C. $2$
• D. $1$

Answer: Option A

Explanation:

• A. $-60$
• B. $-30$
• C. $30$
• D. $60$

Answer: Option B

Explanation:

• A. $196$
• B. $194$
• C. $192$
• D. $198$

Answer: Option B

Explanation:

• A. 15 years
• B. 16 years
• C. 17 years
• D. 18 years

Answer: Option B

Explanation: