If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

MAP Recommended Practice

Course: MAP Recommended Practice > Unit 35

Lesson 18: Greatest common factor
Math
MAP Recommended Practice
Numbers and Operations 218-221
Greatest common factor
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

GCF & LCM word problems

Google Classroom
You might need: Calculator

Problem

Ronald and Tim both did their laundry today. Ronald does laundry every 6 days and Tim does laundry every 9 days.
How many days will it be until Ronald and Tim both do laundry on the same day again?
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
days
Stuck?
Stuck?