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there are 13 couples... the men can shake hands with everyone except their wives and the women can shake hands with the men only......find the total number of handshakes..... ...
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in a center test there are p questions in the test. 2^\left(p-r \right) students give wrong answers to atleast r questions ( 1\leq r\leq p ) if total number of wrong answers given is 2047,find the value of p. ...
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SO atlast after toiling for hours i finally post this question here.... "In how many ways can a total of 1001 be made from numbers 1-100 without repeating any number" remember-using all numbers is not necessary but no number ...
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pls give answer with explanation.... *Image* tell me if image is not clear enough ...
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nishant sir where are u these dayz.... we need u here sir... many questions are unsolved... and we miss ur question of the days and graphs..... atleast i do.... ...
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uploading physics of paper 2 first of all- more will follow if everyone is interested *Image* *Image* *Image* *Image* *Image* *Image* *Image* *Image* ...
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Charlie has 7 cards numbered 1, 2, 3, 4, 5, 6 and 7 and randomly deals 3 of them to Alice and 3 to Bob. All three people look at the cards that they hold. Can Alice and Bob communicate with each other, in the presence of Char ...
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Sally is thinking of a 6-digit number. The sum of the digits is 43. And only two of the following three statements about the number are true: (1) it's a square number. (2) it's a cube number, and (3) the number is under 50000 ...
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*Image* *Image* *Image* *Image* ...
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Give a good approximation for i^i^i^..... ans:0.43+0.36i ...
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The sum of the first few terms in a geometric progression is 11, the sum of their squares is 341, and sum of their cubes is 3641. Find the terms of the sequence. ...
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"Give two different numbers, each of which is the square of the other." and i dont want o and 1 as the answer ...
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http://www.youtube.com/watch?v=c3asSdngzLs can anyone explain how the thing shown in this video was done.... its very interesting...!!! ...
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let f(x) , x ε [0,∞) be a non negative continuous function. If f '(x) cosx ≤ f(x) sinx for all x≥0 then value of f(2π) is- a)0 b)1 c)Πd)none ...
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*Image* Find the flux of the charge q through the upper cap of the cylinder....!!!. (the charge q is kept on the bottom surface of the cylinder....) assume the height to be h and the radius to be r ...
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does vinyl chloride give substitution reaction....???? give reason also..!! ...
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consider a town with n people. a person spreads a rumour to a second,who in turn repeats it to a third and so on.suppose that at each stage,the recipient of the rumour is chosen at random from the remaining (n-1) people. what ...
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prove that (n!)2 > nn (i know the proof but am looking for a much simpler one) ...
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log27 is: a)integer b)rational c)irrational d)complex roots give proof as well ...
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q no 1) let n>=2 be a fixed integer....... f(x) be a bounded function defined in f:(0,a)→R satisfying f(x)= \frac{1}{n^2}\sum_{r=0}^{(n-1)a}{f(x+\frac{r}{n})} then f(x)= a)-f(x) b)2f(x) c)f(2x) d)nf(x) ...
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find the possible number of ordered triads (m,n,p) where 1≤m≤100 1≤n≤50 1≤p≤25 and (2^m )+(2^n)+(2^p) is divisible by 3........ ...
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(2^x)=(x^3)+1 ...
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*Image* if the system is slightly disturbed the rod starts falling down in the direction of the block, form equations to find velocity of block at the instant it leaves contact with the ball (i have solved this one....but jus ...
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a good question for jee aspirants new to this forum...... *Image* suppose an insect (without wings) has to crawl from vertex A to vertex B of the cube of side a shown in the figure then find the minimum distance that the inse ...
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A rod of mass 2m and length 2l is bent at its midpoint making 90° angle find the moment of inertia of the system about an axis passing through the point of bent symmetrically and making minimum angle of 45° with the plane o ...
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two billiard balls of the same mass and size are in contact on a billiard table... a third identical ball strikes them symmetrically and remains at rest after the impact.... the cofficient of restitution between the balls is- ...
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*Image* Extension to my question of 04-04-09.........find the velocity of the system after all possible perfectly inelastic collisions all the spheres have equal mass..... they have velocity whose magnitude is written over th ...
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*Image* anyone finding the area....pls upload a graph too... ...
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*Image* all who wish to give their greetings to the great teachers....just post it here ...
