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

Answer: Option D

Explanation:

• A. 30
• B. 35
• C. 215
• D. 230

Answer: Option B

Explanation:

• A. ±8
• B. 8
• C. -8
• D. ±4

Answer: Option A

Explanation:

• A. 27
• B. 25
• C. 125
• D. 47

Answer: Option A

Explanation:

• A. $\frac{3}{4}$
• B. -10
• C. $\frac{4}{3}$
• D. 10

Answer: Option B

Explanation:

• A. $x^2+y^2=4$
• B. $z^2+y^2=1$
• C. $2\left(x^2+y^2\right)=1$
• D. $3\left(x^2+y^2\right)=4$

Answer: Option B

Explanation:

• A. $2^n\cos \frac{n\mathrm{\pi }}{6}$
• B. $2^{n-1}\cos \frac{n\mathrm{\pi }}{3}$
• C. $2^n\cos \frac{n\mathrm{\pi }}{3}$
• D. $2^{n+1}\cos \frac{n\mathrm{\pi }}{3}$

Answer: Option D

Explanation:

• A. 4
• B. 3/4
• C. 4/3
• D. 9/16

Answer: Option A

Explanation:

• A. 40
• B. 60
• C. 50
• D. 80

Answer: Option C

Explanation:

• A. ± 10
• B. ± 6
• C. ± 4

Answer: Option B

Explanation:

• A. 6
• B. 1
• C. $\frac{11}{6}$
• D. -1

Answer: Option B

Explanation:

• A. Parabola
• B. Ellipse
• C. circle
• D. hyperola

Answer: Option B

Explanation:

• A. অর্ধবৃত্ত
• B. বৃত্ত
• C. উপবৃত্ত
• D. সরলরেখা

Answer: Option C

Explanation:

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

Answer: Option A

Explanation:

• A. greater than 20
• B. Smaller than 22
• C. Equal to 21
• D. Equal to 21
• E. None of these

Answer: Option A

Explanation: