Question

Find the HCF of 70, 105 & 175.

• A. 35
• B. 45
• C. 15
• D. 75

Answer 1

The correct option is A 35

The factors of 70 are:
1, 2, 5, 7, 10 , 14, 35, 70
The factors of 105 are:
1, 3, 5, 7, 15, 21, 35, 105
The factors of 175 are:
1, 5, 7, 25, 35, 175

The highest common factor of 70, 105 & 175 is 35.
Hence, the HCF of 70, 105 & 175 is 35.