011-40705070  or  
Call me
Download our Mobile App
Select Board & Class
  • Select Board
  • Select Class
mildred , asked a question
Subject: PSA Tests , asked on 1/6/13

LCM of two numbers is 28 times their HCF. The sum of HCF and LCM is 1740. If one of these numbers is 240, the sum of digits of the other number is -

A) 2

B) 5

C) 6

D) 8

Certified by MeritNation Expert

BEST ANSWER

Abhinav Verma , From Vivekanand School D Block Anand Vihar , added an answer
Answered on 18/6/13

 LCM = 28 HCF

HCF + LCM = 1740

HCF + 28HCF = 1740

29HCF = 1740

HCF = 60

LCM = 1680

HCF * LCM = Product of numbers

60 * 1680 = 240 * x

x = 60 * 1680 / 240

x = 1680 / 4 = 420

Sum of digits =  4  + 2 + 0 = 6

Ans: C) 6

This conversation is already closed by Expert

View More