Surds and Indices - Shortcuts & Tricks for Placement Tests, Job Interviews & Exams

[@CareerRideOfficial]

Practice Questions on "Surds and Indices" available at: www.careerride.com/mcq/surds-and-indices-quantitative-aptitude-mcq-questions-18.aspx

[@adityagore7296]

Please mention the corrections in comments ... atleast pin them...there is a conceptual blunder in Q5

[@vinitvsankhe]

in q. 5 the tip is incorrect.. you can inverse the signs only if difference of squares of the two terms is one. 9+sqrt(43) when inversed cant be 9-sqrt(43). Thats wrong.

[@sau-bittu]

The answer should have never exceeded sq. of 17, as 9+√42 approximately equals to less than 17

[@guidedmissile4154]

Actually it should be 1/M=(9-√3)/38

[@chandankumarmohanta5666]

Yes it is wrong

[@shivaniagrawal4650]

yes it is wrong

[@vidhikasrivastava131]

Yes I was also confused there

[@dipanjanrana]

In this video lecture at duration 7:20 onwards you have said that if p^n = a+b^(1/2) then p^-n = a+b^(-1/2) and I believed that without verification as you teach very good tricks in previous lectures. But I was facing problems in question 5 then cross-checked and trying to derive your theory. Finally came to the conclusion that you are absolutely wrong. Please remove this part of the video. Otherwise, several time willl be wasted for learners like me.

[@vikram5538]

can't believe how we made this channel that famous. he is teaching wrong things.

[@ankurdixit89]

Solution of 5th question is wrong

[@its_me_01_]

@@vikram5538 can't believe just because of few mistakes you are judging his whole channel... we tend to do mistakes so are teachers... what happened if he got wrong we can comment the right answer with solutions to help others students rather than questioning his popularity my friend.

[@anantkushwaha2827]

Please make a video regarding the tip of question number five that may be in appropriate. As that formula may be incorrect.🙄

[@abhinavchauhan7075]

Sir quantitative aptitude consists of only topics which are explained in your series of 27 lectures 👍🏻👍🏻👍🏻👍🏻👍🏻

[@barbaad7694]

Qno.7 :- We can directly put the value of m in the equation and get the desired answer.

[@biswajitshil5450]

Yes in one second

[@Jay-nd6nj]

I like how u r doing small steps like multiplication to easily understood by beginners.( Happy Teachers Day To u sir♥️)

[@CareerRideOfficial]

Thank you. :)

[@duljitpatgiri7538]

After 3 yrs I'm watching this video on 5 sept. Happy Teacher's Day sir 🎉

[@kunjpatel7821]

sir i don't get if P^n = a+√b then how P^-n = a-√b?

[@rahulmittal4802]

it will be true only if (a+√b)*(a-√b)=1 but in eample 5. (9+√43)*(9-√43) is not equal 1

[@pratyushkesharwani2179]

Ya you are right .

[@rahulr8090]

is the solution correct?

[@Celebrity_arpit]

In this question taking conjugate of a+√b, we get a-√b

[@shubhamparashar6077]

@@Celebrity_arpit u can direct takr conjugate where (1+(1÷x))POWER - n... But here how can u take direct conjugate. In que. 5 here is concept clashing. Herr we have to rationlize the term( 1÷m).

[@UltimateHacksUnleashed]

for 15th question, no of zeros are 31 not 30, since 2000^10 = (2*1000)^10 = 2^10 * 1000^10 no of zeros in 2^10 is 1, since 2^10= 1024 and 1000^10 has 30 zeros , 30+1 = 31 zeros

[@karunakarnuvvula547]

i too got same answer 31...is 31 corect?...then sir is wrong?

[@patrisagar6548]

44:36 answer is 31 coz 1024×10^30

[@qwea825]

in Q5 : i am not sure if we can really substitute 1/m as 9-root(43) . infact 9- root(43) = 2.442 while 1/9+root(43) = 0.0642 it would result in a huge calculation difference.

[@akshayrindhe4614]

Questions no.5 answer is 248 Your solutions is wrong

[@rabirajpradhan1619]

As per ans... It is 322

[@shreedharbadiger7594]

YES EXACTLY THATS WHAT I WAS THINKING

[@shrutimiriyala4048]

Yes answer is 248

[@jaynit2993]

248 is correct i think so

[@Sahil-du9ec]

@@jaynit2993 322 is correct

[@shivrajpatil3110]

In Q.12 why haven't you used the rule of indices to multiply powers i.e. 2*-2

[@AlphinKSajan-f5z]

at 25:39 , a^-n=b-c^1/2 , if a^n=b+c^1/2 .hows that valid coz im not getting such a derivation, couldnt find elsewhere in the internet as well.

[@sumanjaiswal5898]

question 7, directly replace the value of m... 2 line question!!!!!!!!!!!

[@Piyush_ku]

I came here for short tricks but these are not short tricks Nice attempt but u are solving in lengthy way

[@jeevapriya4853]

Yeah .... exactly

[@dijoraj9522]

For number 7, putting the value of m into the equation is the direct method of solving it, (1-4/5)^1/2 + (1+4/5)^1/2 = 3/root5 + 1/root5 = 4/root 5

[@Bug_Hunt]

I also thought same thing. I wonder why did he took a long way

[@meow5316]

can you solve number 5?

[@meow5316]

@@Bug_Hunt can you solve number 5?

[@nityaacharya8934]

Ques 5 is wrong, the trick is incorrect.

[@ompandey808]

Que 7, by directly putting the value of m in the given relation we can solve in lesser times....

[@farheenqureshi239]

but it doesn't make perfect square in bracket that's why solve by this method

[@rowdyghatkar]

@@farheenqureshi239 it does... we get 9/5 in root taking out 3...3A+1A=4A

[@thefamousdog4286]

Yes it does..i tried

[@farheenqureshi239]

@@rowdyghatkar No it can't solved bye direct putting the value

[@shekhargurav5650]

@@farheenqureshi239 no. It gets solved in just 15 seconds by direct putting value. Why making complications by taking formulas...

[@jeevapriya4853]

Sir in que -5 in RHS why u didn't take m value as 9+43 ??

[@sonushet8364]

Given in questiom

[@jiyajindal2221]

In last question you can directly take the lcm of 72 and 24 and the ques will take less time to solve.

[@Hakunamatata01119]

in question no 5 m= 9+ root 43 then while solving m sq should have been 9+ root 43* 9+ root43...................Right????????????????

[@rabirajpradhan1619]

Hello team,,,, in question no.7 if we directly put m value...i got value of 4/√5....so please suggest.... As per your method....16/5.....

[@Arora-Sir]

(15) 44:37 sure not 31 zeros? coz 2^10 = 1024...0 here also :D

[@patrisagar6548]

Yes he was wrong answer is 31

[@RajeshKumar-hr2nq]

What is the correct answer of ques no. 5. Is there anyone who can help me to find the correct answer...248 or 322.. what is correct??

[@qwea825]

around 242

[@NishantKumar-hq3qn]

Sir is this video of surds n indices(all video of different tipic of quntitative video) will be sufficient for all competitive exam???

[@CareerRideOfficial]

Hi Nishant, We try to work with every chapter based on its concept and the concept always stay the same, be it any exam. So, yes these should be good enough for you like many other students. Just ensure that you practice sufficiently and don'f forget to practice with some papers from precious years. All the best!

[@SelvaKarthik07]

For question No 15 Shouldnt it be 31 Zeros because if we do 2^10 we will get 1024 shouldnt we add that zero also ?

[@darsunsundar6278]

same doubt

[@bhagyashribhashkar]

sir you are teaching Awesome but i feel it very easy so i have doubt that in exam such easy questions are ask or level of question is difficult

[@dinesh.p8642]

if m = 9+root 43 how 1/m could be 9-root43? it will be 9-root43/38 na??

[@aizad786iqbal]

Nice but please discuss on the mistakes you made in some of questions like in Q5

[@Unluckyeditzzz]

Yes bro even I cant understand how he put the formula and got ans 😂

[@thundervizz]

sir there a wrong explanation regarding m= a +root(b) then m^-1=a -root(b) it is wrong m^-1 must be equal to (a - root(b))/(a^2 -b) please check this property there is no such property of m and m^-1

[@TejILU]

in 7th qn we can directly use the formula (a+b)^2+(a-b)^2=2(a^2+b^2)

[@shivammehta8284]

Yes but better would be directly put m=4/5

[@Rambosga11official]

q-5 is wrong sir, kindly correct and pin it in the comments sir

[@shaileshkumar3049]

In question 3, two possibilities are there. Either 3b+6=0, or m=1. In the second case, the value of b can be anything.

[@dharaneshreddy252]

ur teaching is so good, kaash hamarey btech ke lecturer bhi aisey hothey,ur simply god bro

[@nituM-o1j]

15 th problem solution can be done like this also 72/?^8/5=?7/5/24 step 1) cross multiply and consider ? as x 72*24=x^7/5 *x^8/5 step 2) multiply the LHS and add x raise to powers as bases are same 1728=x^15/5 1728=x^3 taking cube root on both side x= 12 tada we got the ans it seems lengthy at this moment becz i have explained each and every step in detail in exam you can skip some steps my doing mind calculation and you will get the ans very easily

[@raghuramguptha2022]

Sir please do a video on Time value of money By the way you are sir such a genius in teaching So helpful😊😊

[@abs_smd]

very good sir, i Am suggesting my friends to watch ur videos. your efforts are great sir. thanks a lot for teaching sir.

[@CareerRideOfficial]

Thanks, Kabeer. We appreciate your gesture. :). Don't forget to take the practice tests here: www.careerride.com/online-aptitude-test.aspx

[@dipawalimandaokar3820]

Are these videos also helpfull for engineering aptitude tests for placements?

[@CareerRideOfficial]

Yes.

[@muskanjain2326]

is there any problem in question 5 ? it is lengthy and very hard to understand

[@darshanpithadiya8207]

I didn't get it. How m^-1 will be (a-√b) if m=(a+√b) unless (a^2-b)=1

[@niladri_c]

a^n = p + root(q) doesn' t always mean a^(-n) = p - root(q). Only works when p^2 = q + 1

[@SamyakAditya]

In 15 m = 9+ root 43 and 1/m = 1/ 9+ root 43 = 9- root 43 / (9+root43)(9root43) = 9- root 43 / 81- 43 = 9-root 43 / 38 but sir you have directly taken it as 9-root43. Its a blunder

[@amayatre3558]

Scroll in the comments to get your doubt about question 5 cleared.

[@shreya8576]

In ques.5 , how the (18^2)+2 becomes 324 -2 ?

[@vikrampaswan5204]

If m = 9+sqrt(43) then m**(-1) = (9-sqrt(43))/38 hogaa

[@tejayadav4781]

please make a video on Data Interpretation

[@prakhardixit9803]

In question 5 put m-2 as 1/m2 now add 2 and subs 2 and make a+b square i would be easy

[@naveenkumar7546]

Solving problems takes very long time by this methods

[@vanshayk]

Q5 m2 + m-2 m2 + 1/m2 m2 + 1^2/m2 (m + 1/m)^2 Using (a + b)^2 m2 = 124 + 18√43 m2 = 242 m-2 = 1/242 m2 + m-2 = 242 + 1/242 = 58564/242 = 242

[@kyojurorengoku7191]

sir I believe Q.5 is wrong, can you re-verify it....if you actually calculate the value of m and put it directly into the equation the value comes around 242.03 which is much less that the answer provided in the video

[@Twotips2064]

thankyou sir for this helpful video

[@VIPINKUMAR-tu5dx]

i never expect such type of blunder with so much confidence in ques no 5 m=9 + √(43) then 1/m=9 -√(43) correct it

[@shaswatvikramgupta]

Is this playlist is up to date for recent level of questions in quantitaive appyitude?? Please help someone

[@AbhishekSingh-pq8jq]

Question number 11 and 12 must to be rectify by careerRide Itself

[@berepallirajesh2946]

The tip x = a+b^0.5 => 1/x = a - b^0.5 is wrong ,it needs the condition a^2 - b = 1 ,so answer for question 5 is wrong.

[@manahiljaved2714]

Question no 11 answer should be 1/16 if i am not wrong?

[@MansiBaghel-rh1zp]

i reaĺly.like the way u explain but sometimes u really messed it up to understand sir im sorry but in ques.6 quite.hard ki hua kya

[@arishaarora7908]

sir is the question 5 concept/ trick wrong? sab comments mei puch rahe hai. explanation ya rectification toh de dijiye

[@ashwithau7733]

Yes

[@nadimvalsamanikanta5469]

In 7th que: why not try to directly presented...this way of answer will come only 15 seconds

[@nikitabhanushali7923]

In question 5 why m^2 is written as m^2+m^-2 I didn't understood this

[@misahhere9224]

q7 can be easily solved by direct substitution also

[@jinksthakkar1834]

sir, nice playlist question no. 5 answer should be 248

[@jorden0007]

how can u explain please

[@jojo-dv3uy]

explain ??? even with an app i think it's not a whole number.can you plz explain the ans

[@guddukiratlalpatel635]

Thanks for the video series 😊🇮🇳

[@kushwanthkapa2041]

sir in 15 question zeroes are not 30 it is 31 because 2^10=1024 have a 0.

[@rahulkelkar1246]

Epic.. That didn't even crossed my mind 👍👍

[@Bollywood_view]

Just a suggestion when you have a DIGITAL board why you make such big hoch poch

[@harsimrankaur5663]

In 4th question can we write as 10^3=10^3 After comparing 3 will be the answer?

[@niteshsinghrajput600]

Yes,,but as asked in question we solve like that...

[@sanketdumbare4903]

Sir plz share more exmple of indices and surds

[@adeebh.s1915]

15th question the answer is 31 right? Not 30, since 2^10 = 1024 and we have to add one zero from here

[@karthikbantwal4686]

The correct answer of 7th question is 242.03 or 124+18sqrt(43)+1/3712.

[@kapil100]

q15 - ans should be 31. see 2^10=1024. so there is extra zero. Am i right?

[@MHCVKeshavaN]

Your lecture is really impressive,bcz each and every single point ull explain in detail.....👌

[@modumpuramnagalaxmi7585]

there is no tricks and shortcuts it is only use ful for long answers,no for compititive exams

[@shivanivoda2075]

Please make a video on the topic of prime products

[@sankalpagarwal4007]

sir, question 15 ans is wrong it would be 31 zeroes because 2*10 =20

[@gary6395]

Number 5 is wrong.

[@gaminghub860]

Sir quest 11 is wrong It's ans is 1/16

[@raggun9631]

I got the answer 248 in question no 5 ,..... anyone with same...Is it correct or wrong

[@VIPINKUMAR-tu5dx]

IN ques no 5 how m=9-sqrt(43) please correct it

[@ujjwaldeep5200]

15.) incorrect answer!!!!!!!! 30+1 zeros as 2^10 is 1024.

[@ankitgupta4537]

Sir In question number 7 we can simply put the value of m=4/5 in the expression coz it'll be time saving than what u have explained.

[@desihaxor5690]

exactly

[@SujiWorld]

Yes...

[@ashwithau7733]

Exactly u r ryt

[@anandsinha2289]

​@@ashwithau7733 where did you get placed 😐

[@akshatyadav8883]

PLEASE HELP, is this aptitude playlist is helpful for BCA entrance exam. If aptitude questions are coming

[@CareerRideOfficial]

Yes, Akshat, it is. We work with concepts in all our videos which stay the same be it any exam or year.

[@snegar1677]

How to solve 5 th

[@aryangaur228]

In Q-7, you can just put value of m and can get the answer

[@sahildeshmukh9378]

please be careful of some mistakes in this lecture series guys...some tips are wrong

[@yuva2916]

5th ques why u subtract -2????

[@The_Soul2]

ques no 5 is wrong

[@patrisagar6548]

How?

[@sahilraj3259]

23:31 - 1/m != 9-(43)^0.5 ,

[@gajulanagamani8312]

Make videos on all aptitude and reasoning topics and explanation will be done on slower manner please sir

[@ragavir5565]

For seventh question we can simply substitute the value, simple

[@amolnaik1]

why you said okay okay in every 10 sec its really annoying

[@cryptowithnarendra5414]

This is use ful to me in ca foundation

[@saikarthik8551]

Sir you have made my day ☺

[@mycontents459]

Hi sir, can you explain in 5th sum last part how -2 arrive

[@_mahesh_raut__]

Make video on geometry section for aptitude

[@keshavsoni2213]

Q15. Corect answer is 11 zeros becaue 2^10 = 1024

[@soldierjay4098]

Rich man gave lots of tips ;)

[@sruthi5788]

In question 7 it can be easily done using componendo and dividendo rule

[@blazer4892]

in 8th question how did you get p² on the LHS ?

[@its_me_01_]

by cross multiplications 3p×p + 3×1 °°°°°°°°°°°° =10 p 3p^2+3=10p