Question

Jasleen goes to big bazaar every 64 days and harpreet goes to the same every 72 days.they met each other one day.How many days later will they meet each other again?

Answer 1

the LCM of 72 & 64 is 576 so they will meet at 576th day

Answer 2

Sudhir goes to the market on 64th day 
Sushil goes to the same market on 72nd day
  
the L.C.M of 64 and 72 => 576 
  
the answer is  576 days