Question

The greatest number that leaves remainders I
and 2 respectively when 8178 and 7971 are
divided by it, is
4 19​

Answer 1

☞ ♪ Basically the question is about finding the HCF of (8178–1) & (7971–2)

Now, the HFC of 8177 & 7969 = 13

As, 8177=628*13

7969 = 613*13

So, the number will be 13