• A. mn
• B. n/m
• C. 1
• D. -1

Answer: Option D

Explanation:

• A. 513
• B. 515
• C. 509
• D. 511

Answer: Option A

Explanation:

• A. 7log3
• B. 8log3
• C. 6log3
• D. log3

Answer: Option B

Explanation:

• A. 182
• B. 1456
• C. 728
• D. 364

Answer: Option D

Explanation:

• A. 10x + 45
• B. 10x + 51
• C. 10x + 47
• D. 10x + 43

Answer: Option A

Explanation:

• A. - 9/4
• B. 3/2
• C. 9/4
• D. 3/4

Answer: Option B

Explanation:

• A. ২০/২৭
• B. ৭/২৭
• C. ১৯/২৭
• D. ১৮/২৭

Answer: Option C

Explanation:

• A. 2
• B. 3/2
• C. 1
• D. 5/4

Answer: Option C

Explanation:

• A. ৭৪
• B. ৯০
• C. ৮২
• D. ১০৬

Answer: Option C

Explanation:

• A. 98
• B. 106
• C. 102
• D. 112

Answer: Option C

Explanation:

• A. ৪২টি
• B. ৪১টি
• C. ৪৩টি
• D. ৪০টি

Answer: Option B

Explanation:

• A. $S_{\infty }=\frac{20}{3}$
• B. $S_{\infty }=\frac{3}{20}$
• C. $S_{\infty }=20$
• D. $S_{\infty }=3$

Answer: Option B

Explanation:

• A. নবম
• B. দশম
• C. একাদশ
• D. সপ্তম

Answer: Option A

Explanation:

• A. ৩৪
• B. ৫৫
• C. ৮৯
• D. ১৪৪

Answer: Option C

Explanation:

• A. $\frac{{\left(-1\right)}^n}{n+1}$
• B. $\frac{{\left(-1\right)}^{n-1}}{n+1}$
• C. $\frac{{\left(-1\right)}^{n+1}}{n+1}$
• D. $\frac{{\left(-1\right)}^{-n+1}}{n+1}$

Answer: Option C

Explanation: