KVPY 2016

How much are you scoring? Please post your estimated marks.

Cheers!

#Algebra

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

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Math	Appears as
Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

OK so I found q 17,22,27,67,70 ans incorrect

Spandan Senapati - 4 years, 7 months ago

What is getting for Q67 and Q70?

Harsh Shrivastava - 4 years, 7 months ago

Yes 17,22, 67 and 70 are incorrect but 27 is correct

A Former Brilliant Member - 4 years, 7 months ago

You need to calculate the maxheight attained from ground....you might have calculated it from top of the tower perhaps.....anyway don't worry it happens....exam pressure.....

Spandan Senapati - 4 years, 7 months ago

@Spandan Senapati ,Shouldn't the answer of q-27 be option B?

A Former Brilliant Member - 4 years, 7 months ago

@A Former Brilliant Member – Ya option B is correct for q 27....

Spandan Senapati - 4 years, 7 months ago

Bio was damn difficult ....

A Former Brilliant Member - 4 years, 7 months ago

How much are you getting?

A Former Brilliant Member - 4 years, 7 months ago

I did not check the answer key , how much are you getting ? which problem in mathematics did you like most ?

A Former Brilliant Member - 4 years, 7 months ago

@A Former Brilliant Member – All questions were of good level and interesting.I am expecting about 47-50.

A Former Brilliant Member - 4 years, 7 months ago

Yeah! You are right. Biology troubled me a lot too, I wonder how much I will lose due to it.

Akshay Yadav - 4 years, 7 months ago

@Nihar Mahajan @Adarsh Kumar @Kalash Verma @Vaibhav Prasad @Akshat Sharda @Chinmay Sangawadekar @akshay yadav @everyone .

Harsh Shrivastava - 4 years, 7 months ago

How much are you scoring?

A Former Brilliant Member - 4 years, 7 months ago

Let the answer key come, till then I have no estimation. Overall, my exam was bad 😥😥

Nihar Mahajan - 4 years, 7 months ago

Wasn't biology too tough in SA Stream?

A Former Brilliant Member - 4 years, 7 months ago

I think I was giving AIPMT 😨

Harsh Shrivastava - 4 years, 7 months ago

AIPMT(actually NEET) asks most of the questions from NCERT. but here good amount of concepts were required

Satyabrata Dash - 4 years, 7 months ago

Yeah it was horrible. I will get between 40 and 50.

Kushagra Sahni - 4 years, 7 months ago

yes it was a bit tough.

Satyabrata Dash - 4 years, 7 months ago

Probably cutoff will fall drastically this year.

A Former Brilliant Member - 4 years, 7 months ago

Scoring above 50 was a herculean task!!!

A Former Brilliant Member - 4 years, 7 months ago

.let's wait for the key.....and bio was not difficult....the options were not at all confusing...a little thinking and you know what the ans is......there were q where only one option was apparent......

Spandan Senapati - 4 years, 7 months ago

Think my score is gonna be in 71-75....let's see.....

Spandan Senapati - 4 years, 7 months ago

Wow.....then congratulations!!!!! I don't even think of crossing 50.

A Former Brilliant Member - 4 years, 7 months ago

Good job!. although i haven't seen the paper i too scoreD about 73 last year.

If you do fair enough in interview you will surely be in top 100!

Prakhar Bindal - 4 years, 7 months ago

I expect 73.25 after the correct ans key...and you know in 2014 someone had scored 78 from our school and got air 8!!!!.

Spandan Senapati - 4 years, 7 months ago

@Spandan Senapati – actually 2014 paper was quite tough (cutoff was only 42). so scoring 78 in that is indeed an achievement

i got rank 59 last year coz the paper was slightly easier last year than 2014 . One of my friend got 82 last year still ended up on rank 14

Prakhar Bindal - 4 years, 7 months ago

@Prakhar Bindal – How do you rate this years q paper......???

Spandan Senapati - 4 years, 7 months ago

@Spandan Senapati – I Think its more or less of same level as last year (atleast for PCM) . Biology its none of my buisness

Prakhar Bindal - 4 years, 7 months ago

@Prakhar Bindal – Actually bio is the one making difference this year.

A Former Brilliant Member - 4 years, 7 months ago

@A Former Brilliant Member – i scored 6 last year out of 25.

Prakhar Bindal - 4 years, 7 months ago

@Prakhar Bindal – Great!!!

A Former Brilliant Member - 4 years, 7 months ago

@A Former Brilliant Member – :P. What do you mean? :P

Prakhar Bindal - 4 years, 7 months ago

@Prakhar Bindal – That is more that my score in bio.

A Former Brilliant Member - 4 years, 7 months ago

@Prakhar Bindal – @prakhar bindal...Can you tell if q. 17 and is correct....

Spandan Senapati - 4 years, 7 months ago

@Prakhar Bindal – Ya bio was not high scoring.....this year.....and maths was better then previous years..as of P,C they were quite the same...

Spandan Senapati - 4 years, 7 months ago

Question paper with answer keys have been uploaded at KVPY Official site !!!!! Please post your marks!!!

A Former Brilliant Member - 4 years, 7 months ago

The key is incorrect....physics especially....

Spandan Senapati - 4 years, 7 months ago

Please tell me question numbers you are finding wrong.As of now, i am scoring too low.

Harsh Shrivastava - 4 years, 7 months ago

My marks: 40-45. :(

Harsh Shrivastava - 4 years, 7 months ago

Same here. :(

A Former Brilliant Member - 4 years, 7 months ago

Do add ,5 more marks...friend the key is a bit incorrect....

Spandan Senapati - 4 years, 7 months ago

Like which questions? I may not have attempted the ones you are saying.

Harsh Shrivastava - 4 years, 7 months ago

@Harsh Shrivastava @Kalash Verma @Adarsh Kumar What is your score (including the ones you have done correctly but printed wrong in the keys)? apna apna batao sab

Hrishik Mukherjee - 4 years, 7 months ago

Kindly confirm the answer for the conditions for current to flow in the wire connected to circuits.

I marked “current will flow if E1/R1 not equal to E2/R2.”

I know that if the wire connects 2 points, then those 2 points potential is same. But I got confused during exam and trusted "Kirchoff's law" for junctions.

anoushka gupta - 4 years, 7 months ago

Even I marked the same option :(

Hrishik Mukherjee - 4 years, 7 months ago

To make things simple think this way....the circuits are initially separate..consider any one of the circuit.... current is e/r....now connect them write Kirchoff's voltage law for the same circuit......did you find that the current again remains the same......so what can be concluded is that current did not flow through the wire.....

Spandan Senapati - 4 years, 7 months ago

Oh. Thanks.

anoushka gupta - 4 years, 7 months ago

How much are you scoring?

A Former Brilliant Member - 4 years, 7 months ago

I barely completed the paper.. I don't remember exactly what I marked, what questions I marked.. So I didn't count..

anoushka gupta - 4 years, 7 months ago

No problem....All the best !!!

A Former Brilliant Member - 4 years, 7 months ago

Can anyone tell the solution of Q4. KVPY SA?

anoushka gupta - 4 years, 7 months ago

Apply Cauchy Schwarz inequality on LHS,you will observe that LHS is greater than equal to the RHS.Then apply the equality condition Cauchy Schwarz inequality( in Cauchy Schwarz inequality,the equality exists when the ratio of terms is constant).You will get that 1=a=b.Therefore (1,1) is the only solution.

A Former Brilliant Member - 4 years, 6 months ago

Thanks a lot!

anoushka gupta - 4 years, 6 months ago

@Anoushka Gupta – It can be done without the inequality also-

$(1+a+b)^2=3(1+a^2+b^2)$

$\iff 2a^2+2b^2-2a-2b-2ab+2=0$

$\iff (a-1)^2+(b-1)^2+(a-b)^2=0$

Hence, $a=b=1$ only.

Akshay Yadav - 4 years, 6 months ago

@Akshay Yadav – great solution!!!

A Former Brilliant Member - 4 years, 6 months ago

@A Former Brilliant Member – Thanks!

Akshay Yadav - 4 years, 6 months ago

@Anoushka Gupta – Thanks!!!

A Former Brilliant Member - 4 years, 6 months ago

Guys kvpy has revised its answer keys.what are your scores???

Spandan Senapati - 4 years, 6 months ago

Mine is 72.75.

Spandan Senapati - 4 years, 6 months ago

I Too got this much last year. if you do sufficiently well in interview you will get a decent rank

Prakhar Bindal - 4 years, 6 months ago

Where are the new answer keys?

Harsh Shrivastava - 4 years, 6 months ago

@Harsh Shrivastava – Sorry for late reply.was out for school picnic.in official site you can find the answer keys

Spandan Senapati - 4 years, 5 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$