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

Answer: Option B

Explanation:

• A. 2
• B. 4
• C. 6
• D. 7

Answer: Option C

Explanation:

• A. 2
• B. 100
• C. 37
• D. 4.6

Answer: Option A

Explanation:

• A. $-7$
• B. $7$
• C. $0$
• D. $11$

Answer: Option C

Explanation:

• A. 10
• B. 9
• C. 8
• D. 12

Answer: Option C

Explanation:

• A. 30°
• B. 45°
• C. 60°
• D. 120°

Answer: Option B

Explanation:

• A. 60°
• B. 45°
• C. 30°
• D. 40°

Answer: Option B

Explanation:

• A. $2$
• B. $1$
• C. $3$
• D. $5$

Answer: Option A

Explanation:

• A. ${\left(a+b\right)}^2-{\left(a-b\right)}^2$
• B. ${\left(a-b\right)}^2-{\left(a+b\right)}^2$
• C. ${\left(a+b\right)}^2+{\left(a-b\right)}^2$
• D. ${\left(a+b\right)}^2-4ab$

Answer: Option C

Explanation:

• A. (a+5b)(2a-3b)
• B. (a-5b)(2a+3b)
• C. (a-5b)(2a-3b)
• D. (a-5b)(a+5b)

Answer: Option A

Explanation:

• A. (a+5b)(2a-3b)
• B. (a-5b)(2a+3b)
• C. (a-5b)(2a-3b)
• D. (a-5b)(a+5b)

Answer: Option A

Explanation:

• A. $2\left(a-8\right)$
• B. $\left(a+5\right)$
• C. $\left(a+4\right)$
• D. $\left(a+8\right)$

Answer: Option D

Explanation:

• A. $2\left(a-8\right)$
• B. $\left(1+5\right)$
• C. $\left(a+4\right)$
• D. $\left(a+8\right)$

Answer: Option D

Explanation:

• A. 1
• B. 2
• C. ab
• D. 6ab

Answer: Option B

Explanation:

• A. $\frac{-10}{\left(2ab-a-b\right)}$
• B. $\frac{-3}{\left(a-b\right)}$
• C. $\frac{-7}{\left(a-b\right)}$
• D. $\frac{-7}{\left(b-a\right)}$

Answer: Option D

Explanation: