The HCF and LCM of two numbers m and n are respectively 5 and 210. If m + n = 75, then 1/m + 1/n is equal to	Choose the correct answer
A) 1/14  B) 3/35  C) 5/37  D) 2/35  E) None
1/14nswer   We have, m x n = 5 x 210 = 1050   âˆ´ 1/m + 1/n = (m + n)/mn = 75/1050 = 1/14   Correct Option: 1/14
<result>A</result>
The HCF and LCM of two numbers m and n are respectively 5 and 210. If m + n = 75, then 1/m + 1/n is equal to