Correct Answer - Option 2 : 213
Given:
We have the given numbers 639, 1065 and 1491
Concept used:
The greatest number which divides any set of numbers is H.C.F. of those numbers.
Calculation:
Here, factors of 639 = 3 × 3 × 71
Similarly, factors of 1065 = 3 × 5 × 71
And, factors of 1491 = 3 × 7 × 71
So, H.C.F. = 3 × 71
⇒ 213
∴ The required greatest number is 213.
