Question : If 847 × 385 × 675 × 3025 = 3^a × 5^b × 7^c × 11^d, then the value of ab – cd is:

Option 1: 4

Option 2: 5

Option 3: 1

Option 4: 7

Question : A six-digit number is divisible by 33. If 54 is added to the number, then the new number formed will also be divisible by:

Option 1: 3

Option 2: 2

Option 3: 5

Option 4: 7

Question : If the four-digit number 463y is divisible by 7, then what is the value of y?

Option 1: 4

Option 2: 6

Option 3: 3

Option 4: 5

Question : 6²⁵ + 6²⁶ + 6²⁷ + 6²⁸ is divisible by:

Option 1: 256

Option 2: 254

Option 3: 255

Option 4: 259

Question : If 4x² + y² = 40 and xy = 6, then find the value of 2x + y.

Option 1: 6

Option 2: 8

Option 3: 5

Option 4: 4