Correct Answer - Option 4 : 4
Given:
If M1 = 25 × 36 × 72 × 55, M2 = 23 × 35 × 74 × 5 and M3 = 27 × 32 × 7
Calculation:
M1 = 25 × 36 × 72 × 55
M2 = 23 × 35 × 74 × 5
M3 = 27 × 32 × 7
Common in M1, M2, M3
⇒ 23 × 32 × 7
5 is not in M3, that's the not considered
∴ The greatest common factor of M1, M2, and M3 is 23 × 32 × 7.