Showing posts with label maths. Show all posts

Friday, April 13, 2012

the algorithm for unbreakable password..?

hello friends u all know about the one simple fact that is the square root of 4 can be -2 or +2 , this fact apparently amazes me lot ... because we can go to +4 from either -2 * -2 and +2 * +2 , but just by having 4 we cannot determine which one.(unless some criteria is listed) ..... so we have 2 possible solutions from one number , can we ha infinite possible solution from one number?

Question 1 before i continue u might wanna ask what are the applications of such kind of thing?
this will help in full secure encryption of strings.... and we can pass secure parameters such pass words in querystrings , and thus develop APIs of the website based on querystrings ..

what are APIs?
APIs-the programming or code used to make the database of website available for deveopers.

what are querystrings?
querystring-anything u see in the website url such as ?id=abcd is querystring.

Question 2 HOW TO?
  • convert all alphabets and characters into numbers , let numbers remain numbers (for security reasons make one character into a 3 digit random number.)
  • if their are certain numbers then the whole number becomes negative.
  • multiply the number by itself
  • what u get can be made public without fear!

Question 3 Where is the code?

Friday, March 2, 2012

..... i screwed it again...:'( :'(

so today was the maths examination...hmmmmmmm so how do i feel ? A1?A2?B1?D?
well actually i feel like D (it is just a hyperbole) ....
so ur nex question?
how i screwed it? ahhh dun tell me abt it :'( :'(
the exam started with well timed strategy... section a which has MCQ's went nice , all correct , except for 1  which i had kept for 'come back later' ...

section b also was pretty cool .... at that time it felt .. wow! i got them all correct but the fact was i had intercepted one question wrong , which was que no.14
"Find the value of k, if the point P(2,4) is equidistant from the points A(5,k) and B(k,7)?"
pretty easy right .. yeah i know it is easy , apparently i understood the question as 'P is mid-point of AB . Find the value of k?'
that was all what went wrong into section-b which compromised of 8 questions each of 2 marks

section c was where i screwed loads of things...
in question no.23 there was an option provided .. one was to find area of quadrilateral , if coordinates were given and second was to get point P(x,y) which divides the line-segment such that AP = 3/7AB
well i knew both of them ... and that actually was the problem! so how did i screw it up? i first did top question in which i got the area of quad. as -7 cm square , now that was not possible ... so instead of fiddling with formulas i jumped to next question instead .. in the next question i think so i panicked and understood that point P is actually divided in ratio 3:7 instead of 3:4 .....more worse while revising i got my mistake in above question  where the area of quad was 7cm square and not -7cm square...but then i passed tht question thinking that their is no point is in cancelling the answer again and doing the first option as i thought that i had  already got the correct solution ..

in question no.28 i did worst possible mistake of understandin that 9 * 8 = 63 ... hmm i was trying to divide 943 orally in mind with 8 and the result was that it leaves no remainder ...and no marks :'( :'(  even when i was small , the table of 8 was most difficult to learn ...  whatever ....
this was the question
Find the sum of all multiples of 8 lying between 201 and 950.
i had done similar kind of questions while practicing and this was indeed marked as most easy question in my Together With Book ....BITCH!!@#$#$#$%$%$^&*
While revising the paper i checked the calculations of the main formula ... not that calculation though gahhhh foolish of me..

section-d
question was bit long.. and related to surface area and volumes... first i made a mistake of reading the question wrong , then after cancelling whole damn shit i made mistake by assuming that square of 2.75 + square of 15 is not = to perfect square , and thus assumed nearby values of numbers and then messed with calculations ahead...


i say it i panicked a lot ...... felt like hell after givin the paper but everything was back to normal when i watched  sarabhai vs sarabahi and a castle episode...
WHATEVER?WHO CARES....*




* -- except for parents,teachers,school admission guys,neighbors, friends , and hell of a person who meets u tomorrow :P