1 . a+b=5 এবং a-b=3 হলে ‍ab এর মান কত?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: Option C

Explanation:

2 . a3-b3=513

• A. 35
• B. 45
• C. 54
• D. 55

Answer: Option C

Explanation:

3 . a-b=3

• A. 23
• B. 27
• C. 30
• D. 33

Answer: Option B

Explanation:

4 . a3-b3=36,a-b=3

• A. -1
• B. 3
• C. 0
• D. 1

Answer: Option D

Explanation:

5 . a2+b2

• A. 69
• B. 79
• C. 89
• D. 91

Answer: Option C

Explanation:

6 . a2+b2

• A. 17
• B. 18
• C. 16
• D. 20

Answer: Option A

Explanation:

7 . a+b=5

• A. $4$
• B. $4\sqrt{2}$
• C. $6$
• D. $\sqrt{8}$

Answer: Option A

Explanation:

8 . a+b=5

• A. $2$
• B. $8$
• C. $16$
• D. $15$

Answer: Option D

Explanation:

9 . a+b=7

• A. $48$
• B. $27$
• C. $84$
• D. $3.33$

Answer: Option D

Explanation: