self Maths Puzzle

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?

A. 7640 B. 6460
C. 7240 D. 6780

Read Solution (Total 4)

self Other Question

Vinoth can complete a painting work in 20 days. Prakash can do the same work in 25 days. They start the work together but Vinoth quit after 3 days of work. How many days are required to complete the remaining painting work by Prakash. Divide 28 into 4 parts in arithmetic progression, such that the ratio of product of first and third with the product of second and fourth is 8:15