Find the HCF of 28, 38 and 68.

Correct option is C

Given:

28 , 38 , 68

Solution:

28 $$= 2^2 \times 7$$​​

38 = 2 × 19

68 = 2$$^2 \times 17$$​​

The only common prime factor between 28, 38, and 68 is 2.

Therefore, the HCF of 28, 38, and 68 is 2.