Least Common Multiple Trick LCM

[EwigesEis]

Hey man, I watched ALL of your videos in order to prepare for a very demanding set of exams. All of these tricks are very helpful, thank you so much for sharing it to everybody!

Keep up the good work!

[ethanliu]

AD: wHaT!!!! sTiLl sEaRcHiNg yOuTuBe fOr mAtH hElP?! tRy sOmEtHiNg nEw aNd jOiN sTuDy pUg!
Me: Go away. I got tecmath.

[kylelam]

then how do u do it with 4 different numbers? Do you do 2 numbers using this and another 2 numbers doing this and the result of both numbers you do it together? But still how do you do it with 3-4 numbers

[urgefann]

Took me a bit to catch on, but this is much much easier than the decomposing method in my book. Thank you so much!

[jadabouelzalofi]

OMG YOU ARE A GENIUS. YOU ARE THE NEXT EINSTEIN. GOODNESS. HAVE A BLESSED LIFE DEAR SIR.

[glennfelpel]

Love  your way of thinking!  Thank you for all the effort

[MysticNugget]

This helped me tremendously! Thank you!

[theriptide_]

This is such a good method, so much easier thank you.

[andoidski]

much relaxing to watch in 0.75x playback speed ya know?

[Tsskyx]

I figured out that for the last step, you don't have to divide one of the original numbers by the result, like 5202/17, you can simply look at the notes to the right and work out how many times does the 17 go into 5202 step by step.
Like, the last red note is 2, and the note above it says 1r17, so 2*1+(17/17) is 3. The next note says 6r34, so 3*6+(34/17) is 20. It's also worth noting that these results correspond to the numbers written in the left column, so 20 corresponds to 340, 3 corresponds to 51, etc. The next note says 7r51, so 20*7+(51/17) is 143. The last note says 2r340, so 143*2+(340/17) is 306. If you can't do 340/17 quickly, then just remember that the previous results correspond to the left column. (20 corresponds to 340, so 340/17 must be 20)
Anyways, 306 is the result, because we've reached the top. This seems complicated, but just try it for yourself, it's really not that difficult.

[pokemonhub]

thanks you make it so easy to understand have you have uploaded a tutorial to find the lcm gcm of 3 numbers or more? would be helpful

[Amberussianbeauty]

I’m shook right now. This helped soooo much

[noobkingxd]

if you can't do it to the LCM or HCF like 13 and 6 what to you right as an answer please help

[marshwiggleme]

Hey Techmath, I always get the right answer with fractions initially, then mess up the simplification as i don't know where to start. Best, easiest way to do this?? Is prime factorization a good way? How do you do this? I could not find a video.

[jollyfire]

WOOOW MY TEACHERS STRATEGIE IS SOO MUCH WORSE THANKS SO MUCH TECMATH

[jasonjose]

This method works for two numbers, but what if we need to find LCM of three or more numbers?
Please help me as I find this method (2 numbers) really helpful.

[Bigmooka]

you teach me better tan my maths professor.Thank you.

[siddheshpatankar]

But how will it work for multiple numbers? Say I want to find for 72, 108 and 2100

[danial]

Remember: that the remainder doesn't come from the complete division process, but rather from the first time you do it that's why such as in 9:45, the remainder is 130—from 1040/455 → 1040 - 910 //455*2// = 130 so it's 2 with a remainder 130, and it isn't 2.*285714*. . ., which is what you get for the final remainder after solving it.

[kieronjones]

just finished my maths exams today, feel like i smashed it, thanks @techmamath