## Factor trees are useful way of showing numbers that divide into the larger number.

They’re basically a picture with the number at the top and its factors below.

So, if we look at the number 42, a typical factor tree could look like either one of these:

Notice that the second line in both trees are different. These are still factors of 42 but, if you follow it through to the third line, you’ll get to the **prime* **factors**. **These are the numbers we are interested in.

#### Multiplying them together will give you the original number, so 42 = 2 x 3 x 7

The idea is that the prime factors will allow you to calculate:

- the
**HCF**– meaning the Highest Common Factor. Where you have 2 or more numbers, it is the largest number that will divide into both. Really useful for simplifying fractions.

- the
**LCM**– meaning the Lowest Common Multiple. Great for adding and subtracting fractions.

See how to add fractions for more details.

Most GCSE factor tree questions are grade C and valued at around 4 marks. Although there are a couple of methods to calculate HCF and LCM.

#### Watch these and try the quick test

How to work out the HCF – the easy way

How to work out the LCM – the easy way

How to work out the HCF and LCM using factor trees

[youtube_sc url=”http://youtu.be/uoYYmAtfkcw” rel=”0″]

An alternative method is to use short division. It’s quite useful and can be used with algebraic equations relatively easily 🙂

How to work out the HCF and LCM using short division

LCM Word problem Lars, Rita and Alan

[youtube_sc url=”http://youtu.be/8PzSizD9Ngk” rel=”0″]

* Prime numbers are numbers that are only divisible by themselves and one. In the factor trees shown 2, 3 and 7 are all prime numbers. Click here for How to work out prime factors of a number for a quick reminder.

Watch on YouTube:

How to work out HCF – the easy way

How to work out LCM the easy way

How to work out the HCF and LCM using factor trees

Zainab Jokhio says

this video really helped thank you.

Adebayo Olorunfemi says

please thank you love your teaching

Sukhdev Saini says

This video is very helpful. thank you so much…….

Seshemt Tchetab says

He left out 2 in 12

Nagajothi K says

It is a very useful clip. Next time do PRIME FACTORIZATION.

Julia Sutter says

Thanks that helped me a lot. I’m going to have and exam tomorrow

Atharv Nidhi says

I passed yaay it’s all because of u sir,u r the bestest

Jasper Mohan says

what about 2 in 12

ammad hamza says

Thx u helped alot

Hassan Maroc says

Thanks got end year exam tomorrow 15/06/15 year 8

Aayza The Unicorn says

2:41 “Make sure you have all the factors” He missed out 1 as a factor for

12 =^.^+

Other than that thanks! 😀

michael oreilly says

Thaaaaaaanks!

rajiv gupta says

good!!

Abhishek Patil says

Thanks 🙂

Eric3279 says

This helped me so much! LCM was a blur in my mind until I saw this vid!

Charlotte Smith says

Thank you, this really helped me

Dan ny says

Thanks, I’ve got maths GCSE tomorrow and needed to go over this. Helped a

lot and made it interesting. (Well as interesting as maths revision can be)

Thamer Aldegailby says

thanks man you really helped me

Ryan Douglas says

I found this really helpful

Forza 5 Gameplay says

2 things. The person who invented this method is a genius and secondly,

isn’t there a separate technique for calculating the LCM?

padraic fitzsimons says

ThAnks a lot

Ana Martel Forcano says

Thank you very much because i didn´t now how to do it and know i now and a

got a very good grade in my test THANK YOUUUUUUUU

Movie Maker says

Sorry but isnt 2 a factor of 12 also?

Evelyn Houseman says

really helpful. thanks 😀

Breno Bivar says

Man you saved me before a math test thankyou

themba nsingo says

BRILLIANT!! My lecturer has been trying to explain this to me forever…. I

only just got it now. Thanks!! you’re a rockstar!!

ellie peng says

thanks, this really helps, i’m doing end of year exams and this is a really

helpful and easy way!

Ziyan Baloch says

This helped a lot. There was another video which was good, but i deduce

that this one was just a little better. Do you use prime factors so you

don’t get “interference” trying to manipulate with the correlating factors

that just get the thing messy? Also, how does that trick work where you

find the LCM by multiplying the remaining factors and the result of finding

the HCF?

Atharv Nidhi says

thnx

Matt Crane says

I finally got it thank you very much

Usman Naeem says

youre pro in this !!!!!!!……….my teacher explained a long method!!!

Ejay Dee says

Thanks Simon, this was well explained and really helpful for my stat

assignment…cheers 🙂

Betty wong Wong says

My last name is Simmons

Gigi Tsai says

Thank you so much! This helps heap

Gamer Doge says

Thank you so much, I appreciate the help! 😉

Zoe Hutchinson says

this helped so much!, my maths teacher is crap….

Sarabjit Singh says

Check out this video on YouTube:

sidsood98 says

could you help me with the help me with the LCM of the following terms

A=3^4*5^2, B=2^2*3^3*5^2 and C=3^2*5^3*7 I worked it out as

2^2*3^5*5^3*7 but the markscheme does not agree could you please help me

out. ASAP

ilLinoiSe says

thanks i can now finish homework HELPED ALOT!!

Daniel Moran says

so helpful cheers

WeLsH WiZaRdZz says

Finally found an easy way. Cheers this’ll help for my maths gcse

Mauricio Gil Bejarano says

thank you so much

Saleh Najeeb says

Well it’s good but for 12 2 is also a factor

Jonathan Ngo says

So good

Alex Paul says

Really helped thanks! Used to be really good at them in Primary school but

didn’t do them for 2-3 years and got rubbish! But im good now! THANKS

iona horton says

Thanks this helped me so much with my mats revision!My maths teacher taught

it me a way which I didn’t understand, and this has really helped 🙂

Ezo Playz says

Thnx i really needed to refresh my memory

Caleb Dewing says

a lot with homework better than my mum would explain it

sravani pvn says

LOL!!! what about 9??? 😀

Annastasia Nicol says

Thank u so much my maths teacher does not explain it right im in grdb8 and

I onky figured it out now

Matthew grant says

thanks this helped

nichlous soomaru says

when doing fractions ,finding the lcm is and alternative method? iv seen it

done with out lcm so they are different methods, i wanna know which one

would best suit me.

Timothy Savva says

thank you so much you helped me so much

Muhd Adam says

Ty

Chaz Cole says

Thanks it helped me a lot in my homework!

wilson law says

THANKS, you helped me so much 😀

Kinki Poon says

Thank you so much! It makes me feel better now,haha.

makaveli don says

hats off 4 u. u made it so easy .

james chapman says

This doesn’t work?? For example I tried doing this with 36 and 84?? And I

got the hcf of 6 when infact the correct answer is 12?

Binesh Singh says

Thank you again:)

Binesh Singh says

This really helped…thank you

josh palazzo says

thanx now can finish homework

Noah Chatz says

You missed 2 in the factors of 12

liam rumble345 says

thanks this helped me so much

ajoksable says

Lovely God blessed you, you are the best un saludo desde Huesca,

Sarah Jarvis says

Thank you! You explained it way better !!

Drone Films says

Thanks really helps when I forget how to do things in math.

PROGamer says

Thx I’ll remember that coz in my test today I got it wrong

hsvstheuniverse says

How does a factor tree work if the number goes into decimals. Could you

please help I would really appreciate it. Thanks

mae wickham says

doesnt 2 go into 12???

matthew tomlinso says

Cool amazing asome

DeannaLuvDeidara AJ says

2 is also a factor of 12:)

MrsH7285 . says

Thank you! I’d forgotten all about these from school so helped with

daughters homework

Luke Clash says

Doesn’t 9 go in to 45? 😛

salem elshahomi says

thank you Mr.Deacon

salem elshahomi says

thank you so much this has helped in a phenomenal way now I could go to

class without being shouted at your a miracle

Kronite says

This ain’t no minecraft. Wtf.

Bhoutik Kaneriya says

sir can you pls also help us out in solving quadratic equation…it’ll be

really helpful to us..thankz in advance..:)

Bhoutik Kaneriya says

thank u so much sir..:)

woto thegreat says

this helped so much thank you

Arjun vasanthan says

Thanks this really helps I have a test tomorrow and this will really

help

Ben Noble says

oops a lot

Ben Noble says

very useful thank you so very much you have helped me alot

Chantelle Luu says

Omg, Thanks so much!

Now I finally get it!

On my worksheet there weren’t any diagrams, this helped heaps!

محمد علاء says

Thank you 2 much

Now I can do any HCF activities

Nicole Huffman Hollins says

Great video. I homeschool my son. We are doing fractions. This was very

helpful. Thank you.

Moon Light 101 says

You left out 2 as a factor for 12

Suryaa Kumara Relan says

I can not thank you enough for this video !!! It helped me save alot of

time on my GRE. Thanks alot !!!

MrFudgestick says

you have a very punchable face +Simon Deacon

Heather Brown says

Meghan Lohse says

Yay! This helped me study for a big test! I hope I get good marks

Sean Roche says

f~u~c~k U

Shaan Niazi says

ur the best

Shaan Niazi says

how is it 2x2x3 dont get it

Fran Padavic says

I was looking for Shotbow HCF!

COD Gaming says

Thanks!

Maxim Lanez says

thanks mate needed to refresh my memory

Bassam alnasser says

Thank you so much! very helpful

Leo Lorente says

Thank you so much if you hadn’t helped me I wouldn’t have passed my test!!!

antoinette tesecum says

could u plz teach how to work out a velocity time graph

Arslan Dar says

You helped me do my home work thanks 😀

Rambo Skullcrusher says

Thank you I wish you were my teacher

Rachie Kimberly says

thank you so much ,this has helped me a lot with revision

Rachie Kimberly says

thank you so much this is a lot easier than my maths teachers made it out

to be

mckaeda Augustine says

thank you sooo much. my memory kinda ran dry, and i forgot how to do this

Amy Lieu says

hi Simon Deacon thank you it helped me at my maths homework 🙂

GokuTheMc saiyan says

u are da man……man

thanks

Sidkenie Toulon says

thanks for the info but how do you solve the hcf with three numbers like

3,12 , 24

Mike L says

GREAT GUY, GREAT METHOD!

Melissa Riches says

Why did you only use one set of threes though?? Because there was two

threes left and a two??v

Turlough Farnan says

very useful like your videos you should make one on area of circles and

circumference

Fahad Alajmi says

Thank you sir we appreciate your hard work .

sidsood98 says

night before exam revision and you really helped out thanks soooo much

Sadia elsheikh says

what if there was 2 common multiple? are we gonna add them or something? 😮

fanoflots099 says

Thanks so much for this..It’s gonna be helpful for my test tomoz

wetman king says

Thx

Shush Ninja says

why do u have to talk so much at the start?

Shush Ninja says

how can you forget 2?

Battlefield Gamer says

THANK YOU SIR, I WAS WORRIED ABOUT NOT KNOWING THIS.

YGT TGY says

Oh my god this is so much better and faster than the method my math teacher

showed me! Thanks a lot Sir. 🙂

dom sherry says

Really helpful for test thanks

Talvinder Singh says

8 and 12 =24 and 48

Kevin Amanor says

3:00

Kevin Amanor says

Dude, 2 can go into 12!, you forgot to add two to the list

Lucy Larner says

You are amazing! Thanks so much I asked my friend to help me and she

confused me so much this is clear and easy to understand 100% recommending

to my friends

Gloria oteng says

THNK YOU SOO MUCH- my maths teacher is really bad so i dnt understand wat

she’s saying neither does the class so this vid really helped whilst doing

my homework

gangasta syam says

Thanks for the method 😀

Joshua Long says

That was really helpful.

Yohanna miji says

thanks ….give me a solution. how to solve a algebra for class 10.

Guy that watches videos Youtube says

Thanks! Homework done and dusted

ProBro Bros123 says

That was very useful because I was struggling with the LCM method for

homework thanks a lot+ Learn your 8 times tables 😀

giovanni rubeo says

thanks bro

Akilah Lashley says

Finished my maths homework…thanks!!

Alhaji Barrie says

Thanks

Uddham Singh says

Thanks I had maths homework favourite subject and at the time I was

confused thanks once again

lujein Aldarooty says

Thank u Mr Simon u really helped

Ezzy Ses says

Thank you! I’m in year seven though what should I do if there is two same

numbers in both time tables?

Alpsok says

Mr Deacon, this is brilliant

Thank you so much

Your tone and delivery method is great.

Felicia King says

Thanks much

SeriouslyFunnyNot says

Thanks a lot!

ethan ponnudurai says

on*

ethan ponnudurai says

do u hav a vid in prime decomposition?

fanoflots099 says

Thanks so much! It’s really easy to understand and you explain better than

my teachers lol ^_^

DeeWeext says

What button.. Whaaaaaat button!?

Edward Hope says

thanks!

Alpha kenny body says

but i don’t understand why u multiplied 2 2 3 not 2 3 3

Marcus Holba says

Cheers really easy to understand

ethan ponnudurai says

OMG thanks for helping me! I did not understand anything from my textbook

🙂

Flora Ferroni says

Tahnkyou 😀 you helped me a lot 😀 keep up the good work

Mia Bromilow says

I am studying highest common factors for GCSEs in school at the moment, and

this video really helped me, so thanks! 🙂

Laurent Brutsch says

THANK YOU!

HACKS!

kolinio musuka says

thanks great tutor

Rainy tp says

Thank you. Now I will teach my son a lesson 😉

taryn wiggins says

This is brilliant I tell you, coming from someone who is horrible at math.

Thank you and THANK YOU

fabiapreece says

Just found your channel, and this makes sense to me 😀 Thank you.

Rajni Jain says

it was very useful…thanks !

pranay kapoor says

thanks a lot 🙂

Gaby Thompson says

This is really cool but im trying to divide bigger numbers like 245 and 90

etc. :p

1703Bay says

You really suck you left out 2

dheveen ratnayake says

thx so much, this really helped 🙂

terishma kaur says

OMG thank you so much ..Literally hate maths and am so bad in maths lol but

yh got exam in November and this has helped me 🙂

Ross Albany Ward says

Thanks this really helped me I have been watching LOADS of your videos and

love them all, easy, clear and great methods. Don’t worry about your 8

times table, you will learn them soon enough. hehe :-).

Harvie Gasendo says

your a lifesaver simon..thank you very much ..because of you and my

hardwork i passed my algebra lessons ty very much 🙂

Tizzy Mariah says

omg!!! my hero 🙂

Tizzy Mariah says

thx alott you really help me!!

Tizzy Mariah says

wow!.thats very quick.

Kashkuda Kashiri says

been across your channel a couple of times :D, got my final maths exam

today !, its 2AM this has really helped me; wish i started working this

hard earlier 🙁 in school- thank you so much anyways hoping for a C

Mansurkhon Kayumov says

You are really helping ps im in year 7 ive missed a lot in school so big

thanks for help

Annabel Wright says

Thank you for the video, LCM HCM and Primes have been a struggle all year.

your videos are amazing!

Annabel Wright says

Really silly but does 2 not go into 12 also? Videos are great wish I knew

about them when I started my course. My exam is tomorrow and only found you

yesterday!!!

Josh haffazi says

this video really helped thank you!!!!! 🙂

tunde salawu says

the sum is not correct

Rachel Ainslie says

u missed out two…

stephen barker says

can you tell me how to do factorising

Casper Bman says

+Luker Stormrage

hadi farrukh says

I might do really well in my end of year test courtesy of you and your

great video… Thank you very much!!!

Casper Bman says

Day has been saved

Casper Bman says

Saved the day mate

SuperMsThe says

u missed a 2 on the factors of 12 its meant to be1,2,3,4,6 and 12

Fhd says

Thanks alot for helping appreciate it

Saeed Amir says

u just made my confiused path easier TTHANKS ALOTTTTTT…….

Ashley So says

Thank you very much !! You can help me to do my math homework (:

Rishi Ram Gautam says

Thank you so much for excellent video. I forgot this method which i’d

learnt 20 years before in my school days. Today i found this while

searching for HCF method to guide my daughter. Thanks a lot.

Ams amriys says

Brilliant

buggaman2009 says

for 12 times 9 times 2 u wrote 12*9 = 2 at 3:50 😀

buggaman2009 says

This is not easy

Arthanen Redith says

Thanks

Arthanen Redith says

Hi

RoflJoker1994 says

can u just get to the point ? fucking dumb cunt wasting my time

Antonino Mineo says

A very well done sr. I have watched similar video in Italian language as

I’m italian and they were not as clear as your.

TheLabUnit | Planning says

you missed out 2 though on the 12 line why?

Agam Singh Gujral says

0:54 is the way to go 🙂

save time

ruth samuel says

Please say it is not so. Not the last lesson nooooo!

ruth samuel says

This was very helpful. (Thanks for using youtube educational)

Muntasir Yussuf says

9 is a factor of 45

Peter Close says

Thank you huge help, I get 3D trig, quadratics and all the “outside the

box” hard stuff but its the simple things I always run back too haha,

thanks again

Hamza Iftikher says

Joking I seriously did good thanks!!!

Hamza Iftikher says

Not good got a b in mock exam

Rebecca Jackson says

Thankyou very much your very helpful it was very easy to understand!

Simon Deacon says

Please like and leave a comment!

Visit https://www.3minutemaths.co.uk for real maths, tips and techniques.

Simon Deacon says

Please like and leave a comment!

Visit https://www.3minutemaths.co.uk for real maths, tips and techniques.

Danny Fisher says

Isn’t it 3 min maths

Danny Fisher says

Thank you I really enjoyed this

Oliver Beck says

2 is A factor of 12

Umar Raja says

you are awesome in maths but lol forgetting ur 8 times table

Umar Raja says

thanks it helped me alot thx vry much

Riley Soares says

Thank you so much! You saved a lot of my time! Amazing! What are the other

methods of finding the LCM and HCF? What are their different pros and cons?

XxPNH207xX says

You’re method is very clear and extremely simple to understand even better

than my maths teacher!

desmond micah says

i would like to be in your lessons

Simon Deacon says

Please post, pin, tweet, like or subscribe!

Simon Deacon says

Please post, pin, tweet, like or subscribe!

Simon Deacon says

Please post, pin, tweet, like or subscribe!

Simon Deacon says

Please post, pin, tweet, like or subscribe!

TheImMajestic says

Thank you very much!

Charlotte Woods says

thank you really helpful

Simon Deacon says

Brilliant – congrats!

Memoriesof syria syria says

Thanx i passed the exam 😀 Thank thank youuuuuuuu

Simon Deacon says

Hi try ‘How to work out HCF and LCM using factor trees’ on the channel – might help? All best S

tatiana lisseth says

My maths teach also told me somethibg about that u have to add the numbers. Ex: hfc:12 & 14 i have use the tree methodso i got 12: 6×2,2×3 ;14: 7×2. So rhe LCM is 2x2x3x6x7=504 i just dont really understand that

Simon Deacon says

That’s great and glad it helped 🙂

sweetshabine69 says

u made my life so much easier

Simon Deacon says

Hi Billy – that’s great – congratulations!

Billy Jones says

I love you! I am in year 8 and got an 8a in my test, so happy all thanks to you!

Simon Deacon says

Hi – yes, 7 is the HCF of 21 and 35. All best S

Simon Deacon says

Hi – yes, the factors of 16 are 1,2,4,8 and 16. Rgds S

Simon Deacon says

ooops 🙂

Nimmie Shakes says

hi thank you soo much u helped me alot and can ask tht hcf of 21 and 35 is 7??? 🙂

Blackeyepanda BP says

Would 16 be 1,2,4,8,16?

samiya chaudhury says

you didn’t put 2 for 8&12 question.

Dav Dan says

Thanks so much!

Timi Awolaja says

Very helpful ! Thank you Simon

Simon Deacon says

HI Ivan – yes it will although might get a little complex when you write all the factors at the end. You could also try How to work out HCF and LCM using short division on the channel.

I hope this helps and thanks for the comment.

All best

S

Ivan Loner says

Will it work for 4 numbers?

Ivan Loner says

I like how your attitude to all your viewers are always positive

Eula Gibson says

Thank you quite helpful

Frodo Baggins says

Thank you! It Helped me sooo much 🙂 the teacher did not explain it too well and now i understand!!

Никита Богданов says

we learn that in 2nd or 3 class in school =) lol

Simon Deacon says

Hi – best advice is to try to divide by “2 or 3 or 5 or something else.” The numbers aren’t always so neat but with 75 and 120 try

5 first (will give 15 and 24)

then

3 (will give 5 and 8, which will be the bottom numbers)

So HCF is 15 and LCM is 600.

I hope this helps. Rgds S

Simon Deacon says

Hi – yes, The prime factors of 108 are along the left and then the number at the bottom. You might need to convert this (9 is 3 x 3). So 108 as the sum of its prime factors is:

108 = 2 x 2 x 3 x (3 x 3)

The brackets is 9 from the bottom.

I hope this helps and thanks for the comment. All best S

James Abiola says

Can you also work out the prime factors using short division (bus stop method) or is it just Hcfs and Lcms?

James Abiola says

what if it only goes into it once! e.g Hcf&Lcm of 75 and 120! -_-

Simon Deacon says

Hi – yes it will – but it’s a really hard question!

Simon Deacon says

Hi – Thanks for the comment. You English is much better than my Indonesian! All best S

Park Ri Seul says

It really save me!

My teacher make exercise about finding HCF and LCM with factor trees.

Since I always use the quickest way to find HCF and LCM (my teacher in grade 6 teach my class so we will do UN faster), I never try using factor trees again and forget how to count it. You help me a lot!

Thank you 🙂

I’m sorry for my bad english, I’m still learning.

I’m from Indonesia 🙂

Park Ri Seul says

Did it works on 14175 and 101871 ?

Habiba Ahmed says

helped a lot thanks! 🙂 xx

Emily xo says

thank you so much! really helped!

John-Paul Fitzgerald says

Genius it’s so much simpler now lol

Lamborghini968 says

Thanks!!!!!!!!!

Simon Deacon says

Good luck!

Lamborghini968 says

My Maths exam is tomorrow and hopefully I’ll pass!

KING Samurie says

this is the exact numbers that i have in my mid year exam

Simon Deacon says

No prob – good luck with your test 🙂

Simon Deacon says

No prob – good luck with your test 🙂

e shahid says

thanks really helped for maths test tomorrow ;D

Lollet-Oliv Spano says

yes i also thank you alot because this is for sure going to be in my end of year exam

Joseph Maybin says

Thanks helped me a lot 🙂

Eumesh Weerapura says

Its very helpful. Thank you sir.

Simon Deacon says

Hi – there’s a few in the playlist on the channel. I’ve posted one as a video response for you to link through from. Hope they help and all best S

Daniel Donegan says

Can u make a video on factoring

scaddan98 says

Thank you! This really helped me understand it for my end of year test in a couple of weeks!

Simon Deacon says

That’s great – glad it helped 🙂

Sushma senthil kumar says

Thanks a lot…. 🙂 very helpful!

Simon Deacon says

oops ! Thanks for letting me know 🙂

Basil Shurrab says

Thank u

Ps.in the minute 3.43 u placed an equal sign not a multiplication sign

Simon Deacon says

Hi – thanks for question. Yes, it works with 3 or more numbers. It can also be used with algebraic equations.

fabulachic017 says

Does this work with 3 numbers?

usmaanmalik4 says

Thanks got a maths test tomorrow / please hope it goes well

Ayuub Nur says

This Helped so much easier way then i learnt thanks :D.

Jess Rowley says

omg! This was the exact same numbers and question on my homework!

Rishad Jubin says

thank you so much……:)

Sam Hannon says

thumbs up if u have a maths test tomorrow

ciko963 says

This is very helpful. Thanks!

Labake Salau says

Thank you so much

xLogicify says

You*

xLogicify says

This really helped, thank yoi sir.

Ayaz Jubaer says

really helpful. thank you very much.

Simon Deacon says

Thanks – great observation. I will be reshooting this as the sound is poor quality. Kind Regards S

Ahmad Shafiqullah says

Thanks but u put an equal sign rather than time sign at the bottom 3:41

Naqash Haider says

great vid..thanks a million….

RobloxReviewsTV1 says

Damn I wish I saw this before my monday exam :/

Simon Deacon says

Hi – thanks for comment – best of luck!

Simon Deacon says

Great question!

I’ve posted a video that uses short division to work out HCF – you could use this to find p. The method continues until you can’t use any more common factors to divide. Try putting 12 as the divisor, 24 as the first number with ‘p’ as the second.

As you divide through you’ll get 2 underneath the 24. Underneath the p you need a number so that the 2 and this number can’t be divided anymore.

If you use, say, 3 it would mean that p is 36.

A 5 means p is 60.

Hope this helps.

TheSimpleAdam says

Got A GCSE grade c foundation paper :3 wish me look (: and this vid really helped! Thanks.

amsternaitor says

@ImokaRo mate, i’ve got the same exam as you OCR unit 1? good luck mate

Simon Deacon says

Thanks for your comment and good luck for Monday!

ImoKaRo says

maths exam on monday and this really helped thanks 😀

QueenOfAmber says

So HCF = numbers in common.

LCM = all factors from each number multiplied together?

Thanks for the video mate! 🙂

Gandalf Greyhame says

Great tutorial! Thanks!

amir cortez says

great tutorial !

mattguyman says

Great vid really helped!

Victoria Jane says

Thank-you 🙂

NoblenessDeee says

Great Explanation. I Really loved it. Understood Perfectly.