Question

A gardener waters one plant every 7 days and other plants every 3 days. if he has watered all the plants together today, after how many days will the gardener water all the plants together again ? ​

Answer 1

Answer:

One plant gets watered= every 7 days

Other plants get watered= every 3 days

When will the gardener water the plants together?

We need to find the LCM

LCM of 7 and 3= 21

Therefore, after 21 days the gardener would water the plants together again