• A. ৪৫ বছর
• B. ৪০ বছর
• C. ৩৫ বছর
• D. ৩০ বছর

Answer: Option B

Explanation:

• A. 35
• B. 34
• C. 33
• D. 32

Answer: Option C

Explanation:

• A. a
• B. 1
• C. a-1
• D. a + 1

Answer: Option D

Explanation:

• A. ১৮
• B. ২৪
• C. ৩৫
• D. ৪২

Answer: Option B

Explanation:

• A. 8
• B. 7
• C. 6
• D. 3

Answer: Option A

Explanation:

• A. $A\cup B=B\cup A$
• B. $(A\cup B)\cup C=A\cup (B\cup C)$
• C. $(A\cap B)\text{'}=A\text{'}\cup B\text{'}$
• D. $A\cap B\text{'}=A-B$

Answer: Option C

Explanation:

• A. 3
• B. 0
• C. -3
• D. -3

Answer: Option C

Explanation:

• B. 4
• C. 8
• D. 16

Answer: Option C

Explanation: