If one of them is 175, then other number is :
Answer: (4) 105
The highest common factor ( H C F) of two numbers = 35
The least common factors (L C M ) of two numbers = 525
One number = 175
The product of two numbers = H C F of two numbers x L C M of two numbers
Then, 175 x second number = 35 x 525
second number = 35 x 525//175
Then, the other number is 105.
Hence, the answer is (4) 105.