What is the free Common Multiples & LCM Quiz?
The Common Multiples & LCM Quiz is a free 4-choice web app for practicing multiples, common multiples, and least common multiples in short sessions.
The questions are independently created with original numbers, answer choices, and hints. Students can review the basics, then practice common denominators and cycle-style word problems that often use LCM thinking.
Practice from basics to challenge courses
You can start with simple multiple recognition, then move on to the least common multiple of two numbers, three numbers, prime factorization, common denominators, and schedule-style word problems.
The quiz keeps the time attack, ranking, My Page history, and often-missed-question review system, so repeated practice is easy.
Course lineup
- 10 questions: multiples basics
- 20 questions: finding multiples
- 20 questions: common multiples
- 20 questions: least common multiple of two numbers
- 20 questions: LCM by prime factorization
- 20 questions: LCM of three numbers
- 20 questions: common denominators
- 30 questions: mixed LCM practice
- 50 questions: schedule and cycle word problems
- 100 questions: challenge mix
How this app helps students learn
Many students understand the word “multiple” but get stuck when they must decide whether to list numbers, find the first match, or use prime factorization.
This app separates those steps into courses, so students can start with simple multiples and gradually move toward LCM, common denominators, and repeated-cycle situations.
Hints change with each question and show the numbers in the current problem. Diagrams help students see where multiples overlap and why the least common multiple is useful.
Independent, unofficial learning app
This site is not an official website of any ministry, board of education, school, publisher, cram school, prep school, or educational material company.
This site is not approved, certified, supervised, or endorsed by any such organization or company.
The questions, choices, explanations, text, diagrams, and tables are independently created and are not copied from textbooks, reference books, workbooks, drills, national academic surveys, entrance exams, mock exams, or certification tests.
Please check official websites for formal curriculum, school materials, entrance exam information, and certification information.
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