• A. ৬
• B. ৯
• C. ১২
• D. ১৫

Answer: Option B

Explanation:

• A. ${\left(2n-1\right)}^2$
• B. $\frac{n\left(n-1\right)}{2}$
• C. $n^2$
• D. $\left\{\frac{n{\left(n-1\right)}^2}{2}\right\}$

Answer: Option A

Explanation:

• A. ২২
• B. ২৬
• C. ২৮
• D. ৩০

Answer: Option B

Explanation:

• A. $n\left(n+1\right)$
• B. $\frac{n\left(n+1\right)}{4}$
• C. $n^2$
• D. $\frac{n{\left(n+1\right)}^2}{2}$

Answer: Option C

Explanation:

• A. $2\frac{১}{২}$
• B. $2\frac{৫}{৬}$
• C. $৩\frac{১}{৩}$
• D. $২\frac{১}{৩}$

Answer: Option D

Explanation:

• A. 100
• B. 121
• C. 144
• D. ওপরের একটিও নয়

Answer: Option B

Explanation:

• A. $\frac{121}{80}$
• B. $\frac{121}{81}$
• C. $\frac{121}{49}$
• D. $\frac{49}{121}$

Answer: Option B

Explanation:

• A. $\frac{8}{১৫}$
• B. $\frac{৯}{১৬}$
• C. $\frac{৯}{১৭}$
• D. $\frac{১০}{১৭}$

Answer: Option C

Explanation:

• A. ৬
• B. ৭
• C. ৮
• D. ১০

Answer: Option B

Explanation:

• A. ১৬৯
• B. ২২৫
• C. ২৫৬
• D. ২৭২

Answer: Option B

Explanation:

• A. ${}^{10}C_5$
• B. ${}^{12}C_6$
• C. ${}^{7}C_{14}$
• D. ${}^{3}C_9$

Answer: Option A

Explanation:

• A. 55
• B. 5
• C. 13
• D. 26

Answer: Option D

Explanation:

• A. ১০১
• B. ১০২
• C. ৭৫
• D. ৫৯

Answer: Option A

Explanation:

• A. 28
• B. 27
• C. 26
• D. 25

Answer: Option A

Explanation:

• A. 10929
• B. 10781
• C. 10423
• D. 10241

Answer: Option B

Explanation: