Find the hcf of the numbers given below: k,2k,3k,4k and 5k. where k is any positive integer

Factors of k = k and 1
               2k= 2, k and 1
               3k= 3,k and 1
               4k= 2,2,k and 1
                5k=5,k and 1

    HCF(k,2k,3k,4k,and5k) =k*1                      (becoz k and 1 is common in all)
                                          =k

 Hope it helped!! :)

What are the options