Question : What is the value of 512 × 3 – 25 ÷ 15 × 9?

Option 1: 1521

Option 2: 1425

Option 3: 1486

Option 4: 1536

Question : What is the value of $(a+b)^2+(a-b)^2$?

Option 1: $8ab$

Option 2: $4ab$

Option 3: $4(a^2+b^2)$

Option 4: $2(a^2+b^2)$

Question : If $a-b=2$ and $ab=24$, then what is the value of $a^3-b^3$?

Option 1: 280

Option 2: 124

Option 3: 140

Option 4: 152

Question : What is the value of (2² + 1)(2⁴+1)(2⁸ + 1)(2¹⁶ + 1) .........(2¹²⁸ + 1)?

Option 1: $\frac{2^{256}-1}{2}$

Option 2: $\frac{2^{256}-1}{3}$

Option 3: $2^{256}-1$

Option 4: $\frac{2^{256}-1}{4}$

Question : Directions: If 36 @ 2 = 1296 and 4 @ 4 = 256, then 9 @ 3 = ?

Option 1: 729

Option 2: 343

Option 3: 512

Option 4: 6561