Amar goes to the dance class every fourth day. Karan goes to the dance class every fifth day. Both m

[math_celebrity]

Amar goes to the dance class every fourth day. Karan goes to the dance class every fifth day. Both met at the dance class today. After how many days will they meet at the dance class again?

We want the least common multiple of 4 and 5.
We type in LCM(4,5) into our search engine and we get 20.

So 20 days from now, Amar and Karen will meet again.