Two cyclists begin training on an oval racecourse at the same time. The professional cyclist completes each lap in 4 minutes; the novice takes 6 minutes to complete each lap. How many minutes after the start will both cyclists pass at exactly the same spot where they began to cycle?

• lcm of 4 and 6 gives us 12
  so 12 min later they will meet again at same spot
• 9 years agoHelpfull: Yes(7) No(0)
• meeting at starting point is always given by the LCM of time taken.
  here LCM(4,6)= 12 Ans
• 9 years agoHelpfull: Yes(4) No(0)
• This question is asking you to find the LCM (Lowest common multiple) of 4 and 6.
  Prime factors of 4: 2*2
  Prime factors of 6: 2*3
  
  LCM = 2*2*3 = 12
• 9 years agoHelpfull: Yes(0) No(0)