☰ Contents1.2 · The Fundamental Theorem of Arithmetic36/101
LCM in the wild
Two people circle a track at different speeds and start together. They next meet at the start after a whole number of laps each — the first time that happens is the LCM of their lap times.
Check yourself
Quick check
Sonia takes 18 min a lap, Ravi 12 min. If they start together and go the same way, after how many minutes do they meet again at the start?