let S is a set of all natural numbers less than 120 such that HCF of any element in S and 120 is 1. Find the sum of all elements in S? Pick:
A) 1584
B) 7640
C) 5640
D) 7240
E) 6780
S is a set of all natural numbers less than 120 such that HCF of any element in S and 120 is 1.   Such numbers are,   S = {1, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113}   Sum of S = 1584.   1584NSWER:1584
<result>A</result>
let S is a set of all natural numbers less than 120 such that HCF of any element in S and 120 is 1. Find the sum of all elements in S?