Question

What is the Hcf of 70,210,315​

Answer 1

Answer:

35

Explanation:

Answer 2

Let us use prime factorization method to find out HCF

70 = 2*7*5

210 = 2*5*7*3

315 = 5*3*3*7

Note that 2 is a prime factor of the number 70 and 210 only and it is not a factor of 315, hence cannot be considered for HCF. Similarly, 3 is a factor of 210 and 315 but not a factor of 70, hence cannot be considered for HCF.

Now, consider the common factors of above 3 numbers. They are 5 and 7 only. So, HCF is 5*7 =35