# Greatest Common Factor Explained | Factors And Multiples | Pre-Algebra | Khan Academy

Here’s a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let’s roll.

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Pre-Algebra on Khan Academy: No way, this isn’t your run of the mill arithmetic. This is Pre-algebra. You’re about to play with the professionals. Think of pre-algebra as a runway. You’re the airplane and algebra is your sunny vacation destination. Without the runway you’re not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We’re about to take off!

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## 26 thoughts

1. Eris Dash and Lady Tera says:

do i all way’s have to watch math vid’s for my math class﻿

2. Michaela Roux says:

u forgot multiples or LCM﻿

3. Josiah Rajgopaul says:

GCM is greatest common mistake, I got this joke from my math teacher.﻿

4. CountryBoy__10 Da Beast says:

Why are people calling you stupid captain duckface? Just Shut Up All Yall!﻿

5. Warren Wu says:

Hey did you write Gcd﻿

6. Diego Marcelo says:

Thank u﻿

7. Vortex Domain says:

what recording program do you use?﻿

8. Mega Rayquaza 69 says:

the reason 25 has an odd number of factors is cause its a square number.﻿

9. vince inguito says:

i wonder what happens if videos are what teachers yuse these days ?﻿

10. JustAMeme says:

Here for my goddamn homework…﻿

11. Super_Vegito_Blue 4 ever says:

lol﻿

12. Josh Ng says:

Laggy﻿

how about finding gcd using euclidean algorithim?﻿

14. Golden Pro says:

THX U SO MUCH﻿

15. Maya Burhani says:

that rlly helped me

16. Akkarakhun Jira says:

Thx even though this was uploaded the year I was born in XD﻿

17. Z Malek says:

ASMR﻿

18. Vivi Cama says:

Odd numbers have and odd amount of factors and even numbers have an even

19. Christy Feigenbutz says:

hi﻿

20. PancakesRfam : says:

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21. Marilyn Gonzalez says:

You really help me! :D﻿

22. Allen Thomas says:

Thanks this helped a lot﻿

23. Patricia List says:

You are awesome. You have helped me pass so many college courses!!!﻿

24. Xiaoxuan Li says:

it is great. thank u﻿

25. Jay says:

yee﻿

26. Aaron Parsons says:

GCF means Greatest Common Factor and I’m listing with earbuds/earphones
what ever you call them 🎧﻿