Capgemini Company Numerical Ability LCM and HCF

Three wheels make 18, 24, 54 rev/min. Each has a black mark on it. It is aligned at the start. When does it align again for the first time?

Read Solution (Total 3)

Let the time be x minutes.
Therefore 18x 24x 54x
Hcf = 6
Therefore time = 1/6 minute ie 10 secs
7 years agoHelpfull: Yes(8) No(0)

lcm of 18,24,54=216
now 216/18= 12
216/24= 9
216/ 54= 4
lcm of 12, 9, 4= 36
answer is : 216/36=6 seconds
6 years agoHelpfull: Yes(3) No(2)
18 , 24, 54 =256 (addition)
lcm =36
256/36=6
1/6=10 sec
6 years agoHelpfull: Yes(3) No(0)

Capgemini Other Question

Thomas bought X number of sports goods for Rs.12000. If each item was cheaper by Rs.30 then with the same amount he could have bought 50 more items than X. Find the number of items bought by Thomas ? Is the GDP of country X higher than Country Y?
i. GDP’s of X and Y has been increasing at a compounded annual growth rate of 5% and 6% over he past 5 years
ii. 5 yrs ago GDP of X was 1.2 times Y