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Skanda Prasad's Message Board

You can leave me messages if you have any to share with me...... Hoping for a positive response !!!

Note by Skanda Prasad
2 years, 2 months ago

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+ Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin @Calvin Lin , where did Skanda's account go? Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan It got deleted by Skanda i.e. me Skanda Prasad · 1 year, 9 months ago

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@Calvin Lin By your response I thought what you have thought about me. So I request you not to judge me on my age coz I m still 14 although it is showing 22. I do hope there will not be any clashes in b/w us in the future. I m also sorry for being rude to you and I too hope you feeling the same way. Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad Oh, I was being literal because you asked for a positive response :)


No worries. On Brilliant, because the problems are much harder than what one would normally encounter, it is very common for mistakes / misconceptions to occur. The important thing is to learn from the mistakes and understand why you had made them, and how to avoid them in future.

No one is exempt from making mistakes, me included. I have had posted numerous problems where I got corrected by the community. For example, I had a problem in which I made numerous mistakes which let to all kinds of wrong conclusions. @brian charlesworth came along and helped me fix the problem, which led to this gem.

In fact, I do not know of any avid problem creator who has not had at least one valid report submitted against his problem. Eventually, they get fixed, and the community appreciates their efforts. Calvin Lin Staff · 2 years, 2 months ago

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@Skanda Prasad Good! Sravanth Chebrolu · 2 years, 2 months ago

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@Calvin Lin You've given the literal response sir, +++. Sravanth Chebrolu · 2 years, 2 months ago

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click here for more information on LATEX Sravanth Chebrolu · 2 years, 1 month ago

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Oh Skanda , I happened to see this problem click here. The answer to this problem is wrong , infact Jon Hausmann has given proof to prove it false. I saw that you are one of its solvers.I am very curious to know its method. Can you explain to me how you arrived at this answer? That would be helpful .. thanks! Nihar Mahajan · 2 years, 1 month ago

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Comment deleted Apr 10, 2015

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@Skanda Prasad Since its too easy for you , it may be easy for you to post a solution or explain your approach.Kindly post a solution here or at the question itself. @Calvin Lin his solution may help us. Thanks! Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan I am asking you in a very controlled temper... Who deleted my last comment???

Since it is deleted, I am not going to give any solution... Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad Also , there is a possibility that you may have deleted your own comment and pretending as if someone deleted it.And you are making this fact as a reason to not give a solution , because you indeed cannot give a solution... Nice method of fooling someone. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan My records indicate that Skanda deleted the comment himself.

Given his comment, if it was done in error, let me know and I can undelete it. Calvin Lin Staff · 2 years, 1 month ago

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@Calvin Lin Sir , this clearly indicates that Skanda Prasad is a fake person , 'a cheater'. And to hide his mistakes , he puts blame on others eg: Calvin Sir to hide his mistakes! Nihar Mahajan · 2 years, 1 month ago

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@Calvin Lin I had posted 2 comments, one of them was deleted by me... the other one got deleted of its own accord Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad My records indicate that there was only 1 comment (deleted by Skanda) posted between Nihar's 2 initial comments above (see screenshot below). It is possible that Skanda thought the comment was posted, but for whatever reason, it was not. This should be the end of the discussion (about deleted comments).

In any case, I would appreciate if Skanda can post a solution to that problem.

Calvin Lin Staff · 2 years, 1 month ago

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@Calvin Lin Sir , I am damn sure that he would not be able to post a solution , because he didn't solve it , he obtained the answer by cheating. Also , he could have realized that the problem has faults , and he might have written a report , if in indeed he had solved that problem. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan You already know that I am not able to report any problem... There is something wrong with my system, or the internet or with brilliant. Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad This is also a lie.... Even if you are convincing us that you cannot report a problem , you might have posted in calvins message board about the flaw of that question like you did for @Pi Han Goh 's problem of \(\pi\) (pi).But you did not do even that which means , you are lying again. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan For your kindest information, I have already posted that and I have also told that I do not know how to click a screenshot so that Calvin could troubleshoot it.

Use your eyes and your brains Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad Where did you post report for 'incircle' problem. Please send me the link. (if you are not lying again) Nihar Mahajan · 2 years, 1 month ago

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@Skanda Prasad nope , you are again lying. How can you lie so much to hide your mistake!?! Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan I am not sitting on BRILLIANT to convince people like yourselves, I you want to believe me, then well and good, and if not then you have made your choice... Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad How can I believe you? @Calvin Lin 's records clearly indicate that you are a 'cheater' and a 'lier'. Also you cannot provide solution to a problem which you solved 'too easily'. which means you did't solve that problem by yourselves and you got the answer by cheating! Nihar Mahajan · 2 years, 1 month ago

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@Skanda Prasad Truly speaking , you cannot give any solution. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan If you want to think like that, then fine by me... I solved it, I deserved what I got...

Still, do you dare answering my question?? Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad But how can you solve a 'wrong' question? That question is geometrically wrong and there is a proof which proves it wrong. Do you deserve points for a wrong answer of a wrong problem? Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan Did you finish you 9 th standard, what was your result?? Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad Yeah I finished.Well school maths and science is too easy and I got highest in both.Any problem? Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan What was your CGPA?? Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad What's CGPA? Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan What is your overall percentage?? Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad We have grades... Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan what is your grade Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad A Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan Didn't you get A 1 or A+ Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad The uppermost grade is 'A' in our school. There is no system of 'A1 or A+' in our school. Well don't estimate one's intellect by his school grades because school grades tell us the memory of a child and not the understanding. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan Liar... Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad If you want to convince yourself , come to my school and ask the school staff. You will get answer answer as 'A'. You are a liar and a cheater, don't put blame on others. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan The same way, you come here and check my computer. you are a liar and a cheater, stop putting the blame on others... Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad Calvin has given the proof that you are utterfoolish, cheater , liar.And there is no need to come there , since Calvin has already proved you are lying. Better shut your untruthful mouth , you are a hazard for the brilliant community. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan "All Indians are my brothers and sisters"

Don't we say this everyday? Let us learn to believe our brothers and sisters. Believe in me as I do in you.

Fine, I am sorry for what I said and I shouldn't have been so rude. People are sometimes a bit titchy, we must understand their situation and forgive them.

Here's a simple math

2get and 2give is not easy,

So just double it!

4get and 4give...

Thanks! for the suggestions... See ya! Skanda Prasad · 2 years, 1 month ago

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@Nihar Mahajan You see, people are supposed their brains also...

I am a person who solves questions and later in the night, I get up thinking how are the diff. ways of solving a problem

Something in my heart told me that the answer is 4 for that question. Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad Wow , you solve problems by heart and not brain , interesting! To hide you cheating don't make 'absurd' reasons. Nihar Mahajan · 2 years, 1 month ago

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@Nihar Mahajan Don't believe the truth, believe the power, okay Skanda Prasad · 2 years, 1 month ago

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@Skanda Prasad You are saying 'Don't believe the truth' So you believe in 'lie things and rumours'? I think you will never succeed in life with such bad thinking. You are still to be taught basic moral values... Nihar Mahajan · 2 years, 1 month ago

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Hello every one!! Why don't you try this out?? Skanda Prasad · 2 years, 1 month ago

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Skanda Prasad please follow the guide lines below to write a link.

1) Firstly open the square brackets i.e, [ . . . ]

2) Next, write something in it. example [here]

3) Next go to the page where you want to connect this link. For example if you want to connect the link to you Sound problem, go to that page

4) Next, copy the URL written on the page. For example, in this page the URL can be found above(i.e, https://brilliant.org/discussions/thread/skanda-prasads-message-board/).

5) Now, open curved brackets i.e, ( . . . )(i.e, [here] and beside it, without space( . . . ))

6) Finally copy the URL in to the curved brackets and click post or preview to see it in GREENS! For example, I've made a link to your Sound-2 problem, click here Sravanth Chebrolu · 2 years, 1 month ago

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With reference to your problem and problem, here is the proof that in any cyclic hexagon, \( \angle A + \angle C + \angle E = 360 ^ \circ \). It is independent of BDF being an equilateral triangle, which is not stated in the question, and cannot be used as an assumption in the problem.

Solution: Say the (not necessarily regular) hexagon is ABCDEF. Then, \( \angle A = 180 ^ \circ - \angle FDB \), \( \angle C = 180 ^ \circ - \angle BFD \), \( \angle E = 180 ^ \circ - \angle FDB \).

Hence, \( \angle A + \angle C + \angle E = 540 ^ \circ - ( \angle FDB - \angle BFD - \angle FDB ) = 540 ^ \circ - 180 ^ \circ = 360 ^ \circ \).


I do not abuse the power of being staff. Note that Jon Haussmann's dispute echoes mine. I have stated out the reasons for why your problem was deleted. Specifically, the 2 issues are:

  1. In your question you did not state that \(DEF\) is an equilateral triangle, as such that cannot be used in the solution. It is an unwarranted assumption, and hence a solution of "Let's assume this fact" is not a correct solution.

  2. There are multiple ways to prove a fact. It is not reasonable to use MCQ to say "You can only prove this problem in this certain way". For example, I could have used a lot of parallel lines to show that the sum of those angles is 180, instead of using triangle \(BFD \).

As such, the answer of "By construction proving triangle is equilateral and then by cyclic quadilateral property" is not correct because it is a false statement. Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin I am 100 % sure that it is accurate question and with a valid answer. As you would have noticed, I have posted my solution. If you prove that it is wrong, I will also stop posting this question again and again. Skanda Prasad · 2 years, 2 months ago

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@Calvin Lin If you do not know to solve in this way then please see the solution given below.

By construction, OB=OD=OF.

If you use a little of your brains, you might understand that BDF is now an equilateral triangle, by the isosceles triangle property of triangles OFD, OBD and OBF.

Hence all angles are equal in the triangle BDF as OB, OF, OD are the radii of the circle.

Now consider the quadrilateral DBAF, As angle B = 60 degrees, angle A = 120 degrees.

In the same way, it can be proved for the angles, C and E Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad Are you claiming that if \( OB = OD = OF \) then \( BDF \) must be an equilateral triangle? This would imply that any 3 points on a circle always form an equilateral triangle.

Can you explain the following diagram them?

Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin If you have any confusion with the fig. then pls check my problem known as " Geometrically Brain teasing Problem by Skanda Prasad" where you will get the fig. and clear the confusions, if you had had any.... Thank You Sir !!!! Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad I have seen the figure. It has not implied that BDF is an equilateral triangle.

Unless, the figure is trying to say that Angles A , C ,E are equal, in which case that should be clearly stated in the problem. And if so, then ABCDEF is a regular hexagon, and so there are 2 possible answers to your problem. Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin You have asked me for the proof and I have given it to you. Consider the quadrilateral DBAF after proving BDF is an equilateral traingle. as angle BDF = 60 degrees, angle BAF = 120 degrees

Consider the quadrilateral DBFE, as angle DBF = 60 degrees, angle DEF = 120 degrees

Consider the quadrilateral DCBF as angle DFB = 60 degrees, angle DCB = 120 degrees

Hence Angles A + C + E = 120+120+120 = 360 Skanda Prasad · 2 years, 2 months ago

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@Calvin Lin For your information Sir, I have "proved" that BDF is an equilateral triangle just now , which you had rejected before. Remember?? Sir?? Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad You have not proven that BDF is an equilateral triangle. It is not true that BDF is an equilateral triangle. Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin Sir its 12:00 am in the night, my parents are asking me to sleep now and could we please continue our conversation at round 15 hrs later, it would be afternoon here by then........

thank you for your co-operation........ Skanda Prasad · 2 years, 2 months ago

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@Calvin Lin I have also said that OD is "also" the radii of the circle. But the figure you have given does not have OD as radii. Does it ? Sir ??? Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad B, D, F are points on the circumference, so OB, OD, OF are all radii of the circle. So yes, OD is a radii. It is just not drawn in as yet. Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin I was just surfing in your message board. You had changed a person's age..... Is it possible for mine too, Sir?? Could you please change it as 14 from 22 ?? Skanda Prasad · 2 years, 2 months ago

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@Calvin Lin Also note that there is no O in the diagram you have just posted.... Skanda Prasad · 2 years, 2 months ago

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@Calvin Lin Please Note that I have given a reason for OB=OD=OF.(they are the radii of the circle)

Hence they are equal. Simple!! Isn't it Sir??

And also note that O is the centre of the circle. therefore radii are the same in the circle....!!!!!!

I have no pleasure in explaining the diagram because it is not the one related to my problem Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad O is the center of the circle and I thought it didn't need to be labelled. I have since edited the diagram accordingly.

Yes, OB = OD = OF as length. In the diagram, I have given you points O, B, D, F such that OB = OD = OF. But BDF is not an equilateral triangle.

Note that even though OB= OD = OF, this does not imply that BD = DF = FB, which is necessary to show that it is an equilateral triangle. Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin Did you understand another concept of isosceles triangle property?? Sir?? Consider triangle OBD OB=OD hence angle OBD=ODB

Consider traingle ODF OD=OF Hence angle ODF=OFD

But angle ODB=ODF and angle ODB+ODF= angle BDF

In the same way we can take the triangles OBF OB=OF Hence angle OBF=OFB

angle OFD+OFB=angle DFB

HENCE angles BDF = BFD = DBF (in the same way) AS ALL ANGLES IN A TRIANGLE ARE EQUAL, THEIR SIDES ARE EQUAL AND HENCEFORTH CONSIDERED TO BE AN EQUILATERAL TRIANGLE. Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad

  1. I agree that angle ODF = OFD
  2. I disagree that angle ODB = ODF. Why must this be true? What is the isosceles triangle that you are referring to?
  3. As such, I disagree with anything that comes bellows, like angle OBF = OFB.
Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin Why dont you agree sir??

Here's the proof...

Consider the triangle ODB in which angle ODB=OBD

Consider triangle ODF angle OFD=ODF

Come on!! you must know that the equal radius bring equal base angles.

Hence, angle ODB in the triangle OBD and angle ODF in triangle OFD have the same measures.

in the same way, if you add angles OFD and OFB you will get Angle DFB if you add angles OBF and OBD you will get angle DBF when all the angles in a triangle are equal, it is an equilateral triangle

IT IS TRUE FOR ALL SUCH ANGLES IN THE FIG. HENCE IT IS AN EQUILATERAL TRIANGLE. Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad

  1. I agree that angle ODB = OBD.
  2. I agree that angle OFD = ODF.
  3. I do not agree that angle ODB = OFD, unless there is some other reason which you have not stated. What does "equal radius bring equal base angles" mean?
Consider the following diagram. OB, OD, OF are radii of the circle marked in red. Is BDF an equilateral triangle (marked in blue)?

Calvin Lin Staff · 2 years, 2 months ago

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@Calvin Lin Sir pls donot make and post meaningless figures, just talk about mine. there was a hexagon in which the triangle is enclosed.

I m completely sure that my solution was correct and "meaningful" I donot wish continue this arguement, or whatever you might call it.....

THANK YOU FOR YOUR CO-OPERATION AND SUGGESTION, YOU ARE VERY BRAINY, INTELLIGENT, AND I AM AN ILLITERATE FELLOW WHO DOES'NT KNOWS TO READ............ HAPPY ?? PLEASE LEAVE ME ALONE AND I DO NOT EXPECT ANY MORE COMMENTS ON THE PROBLEMS I POST. PLEASE STOP DELETING PROBLEMS WHICH "YOU" DONOT LIKE, PEOPLE MIGHT HAVE POSTED WITH A MEANING ONLY AND NOT JUST FOR FUN.........

I dont give a damn about Jon Houseman or whoever he is... that is very unessential for me....

THANK YOU !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad Before talking about your previous comment, check out my question for the troll king contest by clicking here Sravanth Chebrolu · 2 years, 2 months ago

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@Sravanth Chebrolu Oh! This one! I tried to solve it long ago..... But unfortunately I got it wrong.... Ha Ha !! Never mind....... I thought that in 2 and a 1/2 hours, there are two COMPLETE hours so I clicked '2'. Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad Well then, but why don't you join the troll king contest by posting an April-fool-ish queston??? Sravanth Chebrolu · 2 years, 2 months ago

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@Sravanth Chebrolu yeah !! sure why not ?? But I've got to think about a question like that.. Isnt it ? Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad Yup! everyone on brilliant.org are racing to win that contest. . . Sravanth Chebrolu · 2 years, 2 months ago

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@Sravanth Chebrolu What is use of winning this contest?? Skanda Prasad · 2 years, 2 months ago

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@Skanda Prasad I too clicked 2 :D Nihar Mahajan · 2 years, 2 months ago

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@Skanda Prasad Which question you are talking about? Nihar Mahajan · 2 years, 2 months ago

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@Nihar Mahajan They were talking about this, which has now been deleted. Sravanth Chebrolu · 2 years, 2 months ago

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