A least common multiple word problem about caring for a lawn

Baxter waters the lawn every 3 days and mows it every 7 days. He both watered and mowed the lawn July 2. When will he next water and mow on the same day?


Let us write down all the dates Baxter will water the lawn in July.

July 2: water the lawn

July 5: water the lawn

July 8: water the lawn

July 11: water the lawn

July 14: water the lawn

July 17: water the lawn

July 21: water the lawn

July 24: water the lawn

July 27: water the lawn

July 30: water the lawn

Now, let us write down all the dates he will mow the lawn

July 2: mow the lawn

July 9: mow the lawn

July 16: mow the lawn

July 24 : mow the lawn

July 31 : mow the lawn

After a close examination, we can see that he will water and mow the lawn on July 24.

The method above though is lengthy and time consuming. Is there is quicker way to get the same answer? Yes!

Just get the LCM of 3 and 7

LCM(3,7) = 21

21 days from July 3 will take us to July 24.

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Geometry word problems.

Recent Articles

  1. Introduction to Physics

    Nov 18, 20 01:20 PM

    Top-notch introduction to physics. One stop resource to a deep understanding of important concepts in physics

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

                                 Follow me on Pinterest

Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.