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LCM (least common mutiple)
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LCM (least common mutiple)
October 06, 2013 1:55:41pm
    Post: #1 
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LCM (least common mutiple)
hi i am in grade 6th and we are just introduced towards lcm but that day i was absent now i dont understand anything and explaination in book kindly help me also remember i know tables till 16 atm also i know the common multiple way but i dont know the division method and prime factorization can u teach i will be glad because tommorow there is a test of maths of lcm

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October 06, 2013 2:01:11pm
    Post: #2 
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those number which are in question - like 2, 7 and 10. their lcm wud be the number which comes in their mulplying tables. so if you study the table..70 is the least number which can be divided by all those 3 numbers.. so LCM = 70. :p

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October 06, 2013 2:03:33pm
    Post: #3 
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hey and what about prime factorization and division method ?

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October 07, 2013 8:28:05am
    Post: #4 
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bump need the method still

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October 07, 2013 8:50:28am
    Post: #5 
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lol, i failed twice in math same year.

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October 07, 2013 8:52:30am
    Post: #6 
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[you must login to view images] did that with the help of screenshot xD

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October 07, 2013 1:28:04pm
    Post: #7 
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so lcm u need the numbers and keep dividing them by prime numbers and the prime number must atleast get into 1 of them and keep on doing that thill they are all 1 so you multiply the primes u used and boom thats ur lcm

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October 07, 2013 1:34:30pm (This post was last modified: October 07, 2013 1:37:22pm by elishagrace.)
    Post: #8 
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LCM (least common mutiple)
in prime factorization, start dividing with the smallest prime, for example we have 56, to find its prime factors start dividing using 2. so 56/2 = 28, then if is still divisible by 2 just continue dividing,
56/2=28
28/2=14
14/2=7
and since 7 is another prime then 56=2x2x2x7..


* oh sorry attacker, I didn't see this before.. I should have helped you.

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October 08, 2013 2:40:19pm
    Post: #9 
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huh that much easy is prime factorization method just do that divisble but still one question 56=2x2x2x7

lcm is 2x2x2x7 just that the lcm ?

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October 08, 2013 2:45:37pm
    Post: #10 
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no the lcm is 56 :D

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October 08, 2013 2:47:50pm
    Post: #11 
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huh wasnt 56 the number of which we need to find lcm?

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October 08, 2013 2:52:20pm
    Post: #12 
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yeah my mistake u dont need to multiply idk if im doing hcf here

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October 08, 2013 2:54:16pm
    Post: #13 
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oh man now what is the heck HCF

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October 08, 2013 2:55:08pm
    Post: #14 
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nvm im doing lcm u are just doing prime factorization in that which you will need in lcm its just you will have more then 1 number and will continue to facotr them thill they are all 1 with primes that get in atleast 1 of the numbers then you multiply youre answer

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October 08, 2013 2:55:51pm
    Post: #15 
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HCF is just highest common factor youll do it this year bro :D

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