PRIME or COMPOSITE ? Check in 10 Seconds

[@Invincible-x7y]

Agarawal peoples are legend that's why im using Dr. R.S Agarwal's Elementry Book for competitive exams, it's perfect helping me alot.

[@IamTessa8888]

Agreed 😀

[@ananyasingh5809]

Improving your English will help you in becoming a civil servant.

[@incognito3864]

People not peoples

[@swyj775]

@@ananyasingh5809 lol you are really gonna call out somebody because of their English? Pathetic behaviour 💀 remember English is just a language :)

[@climate9331]

Mate .. rs Agarwal books are not good for competitive exam preparation. It's good for academics , you can prefer Pearson,hc,verma,rd Sharma .for exams like NTSE / KVPY

[@syedmdabid7191]

Close perfect square rule:- it's useful upto 4 digit. For bigger no. We confuse and more time. 2- 6n+1, 6n--1 rule has been proven to be false.

[@Corazonlatino1995]

You are wrong!! If I want that I believe to you, make me 1 example!! 🤷‍♂️

[@syedmdabid7191]

Example: 25= 6×4+1, 49= 6×8+1 etc

[@SuperHuman748]

Another Solution :: Take a number say p square it p*p subtract 1 from p*p now divide by 24 if it divided its prime. That's it. Formula is p is prime if [(p*p)-1] ➗ 24=0 then p is a prime number. Only Exception cases where p is 2 & 3.

[@frintasudheeran5131]

For example??

[@Corazonlatino1995]

He didn't do any example😢

[@koyel4568]

193(193-1)÷24=0 then it is prime. Thanks 😊

[@Corazonlatino1995]

@@SuperHuman748 Maybe you wanted to say : *p(p-1)÷24=0* and not {(p*p)-1} ÷24=0 right?

[@himadrithaker4857]

Thanks sir, it helps my 9 years old daughter to clear her concepts.

[@cqqp]

Amazing!

[@meerabfatima6561]

@@cqqp No wayy Big Fan

[@Corazonlatino1995]

For example the last number 627 is not only divisible by 3, but by 11 and 19 too. So the prime factor of 627 are 3×11×19 and therefore his submultiply are: 1,3,11,19,33,57,209 & 627. 👍💪🤙🤦‍♂️🇪🇺

[@ppscpreparationwithhammad]

Best video i have seen so far for prime numbers

[@habiburmondal1321]

Fantastic method sir

[@ajaykumarchoudhary1073]

sir you are excellent
this is my second time i am watching your video
i just understood that you are an exllent teacher

[@prakashchandradash8393]

I saw this method and now i am in a curious way to like this hard sums thanks Mr Agarwal

[@peternyekete6802]

Great video

[@BNMohapatra1964]

@Sawan Challani , 319 is in the form '6n+-1' i.e. 319=6*53+1, it means it may be a prime number ⁉️
319

[@payalmanjrekar9717]

Thank you for this useful trick 👍

[@khushbooaggarwal5644]

Thankyou so much sir. With your help and guidance, I am able to solve these type of questions.

[@diwakarrajak2515]

This is best vedio for understanding the prime numbers

[@nehamakkar885]

This method is fabulous , i saw so many videos but mujh end me aa hi nhi rha tha .thank you sir

[@suryanshmunglauna543]

Explain prime no

[@nassrrwe1065]

Hi .. lam 60 years old now
I wich the know you 40 years befor
Thanks alot

[@mamtagoyal4994]

Sharab bahut behtarin Ho Mujhe aapane acche se Sikha Diya Prime kya hai composite kya hai thank you you sir thank you so much☺☺

[@Smiley_028]

What a easy trick sir very helpful 😊😊

[@hitarthsoni6042]

Thanks! Sir.

[@vijaykumaranuroop]

Tq sir u r God nice excellent sir

[@sangeetabehera6536]

Thnk u sir....for explng the concept in supr way

[@viveksinghchouhan948]

Ek number sir !

[@azad5932]

Thanks for making this video. My daughter's homework became easier. But this method is effective as long as step 2 is a small number. When i tried tjis method on 677, i had to find a number square above 677. Kids in grade 6 need a calculator for this, which is prohibited. Lets hope my daughter doesnt get a large number like 677 on a test.

[@shobasujana6537]

Incredible sir🙏🙏🙏🙏

[@mangasenju1320]

This is so easy now thank you so much

[@SathyaJ-q1t]

Thank you Sir.

[@kepton21]

Thanks sir it is better method to understand easly

[@abhinabamritkar8432]

Sir pls tell me how it will work in 57 as 8²>57 and 2,3,5,7 can't divide 57 but 19 can so here the shortcut isn't working or something in process is wrong ?

[@march_mellow3]

Actually 57 is divisible by 3......

[@mdmaajidmanir]

@@march_mellow3 lol big mistake 😂

[@abhinabamritkar8432]

@@march_mellow3 😑thanks

[@extrememathematics8144]

@abhinabamritkar8432 ji 5+7=12 which is divisible by 3 so 57 is divisible by 3 so 57 is not a prime number

[@superdragonballheroesworld3014]

sir u are fantastic

[@Nao20244]

Thank you sir. You are the best

[@sauravsagar01]

well done sir....excellent job

[@AnkurSRKaushik]

Thank you so much 👍

[@KumarKumar-gt9px]

Amazing class👏👏👏👏

[@jyotishridhar4095]

Amazing method to check a number whether its prime or composite👍

[@rakitarakit4079]

Sit thank u very much sir🙏

[@SanjayPatil-zh7lc]

Thanks sir you are great sir

[@rashmiagarwala2765]

Your method helped me, thank you

[@astroporpoise7802]

You're a fantastic teacher: knowledgable, clear, thorough, and kind. Thank you so much for your help! Subbed :)

[@miniflipper4836]

what an amazing method, I never heard of it

[@dipakshah3842]

Sir can you make a video for more larger number becz it is in our 10th ncert syllabus sir if you do it it will be very kind of yours

[@studywiz.16]

sir I'm in 6th grade and ncert chapter 3 is a headache to check this method helps a lot

[@uniquely_angel7527]

Thanks.🙂

[@twinkleb9961]

Sir really big thing.its very useful

[@ravisoysa1128]

Execellent explanation sir

[@knowledgecomesfromhere6332]

Awesome sir

[@adriancollier4681]

Thank you. Needed this trick before my discrete math midterm. You're a lifesaver

[@anuradhachaturvedi2469]

Same

[@prikshit545]

Superb 🎉😊

[@mrscientist6949]

Wow 🤩 easiest method

[@Jahanvi655]

Great method sir...really it helped a lot

[@webhead7555]

Sir, thank you for explaining.

[@RajSingh-id9gr]

Thank you sir 🙏🙏👍👍

[@sultanaparvin5410]

0.47

[@gotoshawty]

sir saviour ho aap 🙏

[@a-37-alenvarghese70]

Thank you sir
Really helpfull

[@saimasohail1879]

Very helpful

[@pankajbalwant437]

Than u so much 💚

[@RajThakkar248]

Cool trick sir👏👏👏

[@swetha1814]

Aapki video bahut achi Hai ase hi daliye

[@pulkitjain9679]

Thank you sir .it helped alot.

[@nahlaafrin7168]

Thank you, clear and easy to understand video.

[@bltaj8592]

great one
thanks sir

[@learngitaforkrishna7098]

Nice video for my final exam tomorrow

[@k.annaya6333]

aaaa thankyouu so much, this is really helpful

[@prashanthmadishetti9591]

Thank You Sir 👍

[@neeschal779]

A lots thanks sir for helping me with trick👍️💓

[@para5033]

This method is useful for any no
I mean 4 digit 5 digit etc
Please reply 🙏❤

[@gutlestarmimmy3420]

Very nice explanation sir

[@sreeram5786]

Tq very much sir

[@betawithbrett7068]

Wow!! This algorithm looks like the easiest to implement in Assembly language.

[@md.alauddin627]

I have not seen any teacher useing simple ways to explain

[@MeemHaMeemDhal--khaYaRaWawNun]

453 is not a prime because 4+5+3 =12 and 12 is divisible by 3

[@jeffw1267]

If you mentally group the numbers, it's easy to see that 453 is composite. 45 is divisible by 3, and 3 is divisible by 3..

[@sheelathapa.3405]

Thank you so much sir.

[@ksenvirolabs1257]

Very useful class sir

[@karishmaparate5402]

Thank you sir
it helps me a lot

[@nviji7782]

Thank u sir..it was very helpful

[@bandaruramana2119]

Excellent

[@Rabindramistry]

Thank you for tech this technic

[@syedmdabid7191]

It's smaller number. Say for larger number more than 5 digits.

[@anuminhas9717]

You are great sir
You make learning fun instead of boring . I found maths hard but you made it easy 👍👍👍👍👍

[@sureshaggarwal]

Thanks. Do share the links with your WhatsApp groups and contacts

[@anuminhas9717]

I surely will sir, this will help them a lot

[@danishfaraz9154]

Conceptual vid ,good sir.

[@fitnessfreak2977]

But by using this trick "2017" should be composite no. Because the square root of 45 Is 2025 ..
But 2017 is prime number ..

[@TheDHemant]

Sir why not the largest perfect square less than equal

[@sidrasaeed7142]

This approach is not applicable to certain numbers like 143, 121.

[@kevingast4519]

Using your method, 563. 5 + 6+ 3 = 14. 14 is divisible by 7 (prime). Therefore, 563 is not prime. But 563 IS prime.

[@ervivekchoubey]

No I think you got that wrong. It is only for divisibility by 3 that we test like that. For example to check whether 129 is divisible by 3 or not, we do 1+2+9=12. Since 12 is divisible by 3 so 129 is also divisible by 3.
This rule is only applicable in case of divisibility test by 3. For other numbers it is different.

[@ervivekchoubey]

For 563
Check the next perfect square i.e, 24²=576
So, all the prime nos. Below 24 are 2, 3, 5, 7, 11, 13, 17, 19, 23
Now check if 563 is divisible by any of them. You will find it is not divisible by any of them. So, 563 is prime number.

[@sahrishgulzar258]

best video so far, thankyou

[@chintugamer418]

It is Last night , before exam i was seeing this video right now. Sir you had explained very well thanks sir

[@lalitkishor2830]

Check whether 26 is composite or not

[@uroojrazzak4461]

Its not..as 2, 13 and 26 it self is it's factors

[@gopianandhi2017]

26 is not prime number

[@jyotsanaraisinghani5012]

किती छान!

[@mukeshdas8644]

Nice explanation

[@AjayKumar-jy5gu]

👑 thank you king

[@ahumanbeing8393]

Really helpful sir

[@dpratap]

Sir I need to know how this method is working what is the logic behind it ???

[@arby133]

I think primes are numbers that aren’t divisible by anything (except 1 and itself)
First find the closest square higher than that (we’ll call this x)
Find all the primes less than x
Divide the number by all your primes
If it is divisible by any, it is composite, if it is not divisible by any, it is prime

[@farjanamammi8495]

THANK YOU SOOOOOOOOOOOOO MUCH SIR

[@luminouscreations6805]

Thank you so much sir:)

[@poojamakasare8829]

Thank you

[@npregmi6952]

a good teacher

[@Punjabei]

How about a bigger no like of 6 digits.... We cannot find out a sqrt so easily for that and mention all the prime numbers before it..

[@ankitchandrakar6581]

Veru nice sir 😮