Recently Active Mathematics Questions

no of rational no.s lying in the interval : 2002 to 2003 all whose digits aftr the decimal point are non-zero and are in decreasing order.. ?? ...

solve graphically 25x2+18x-5=0 ...

What is a asymptote? ...

BT vs FIITJEE (keeping following in mind) 1.in terms of no of students taking 2.whose percentile is almost equivalent to iit jee(imp) 3.whose que r closely related to iit pleaseeeeeeeeeee give ur votes am in need of it ...

My max sir gave some questions and i donno whether the answers r rite & method 4 some is unknown 2 me.... 1. A die is thrown thrice, find the probability of getting an odd number at least once Answer got: 5/8 2. The probabili ...

f(m,n) = 3m + n + (m+n)2 Find Σn=0 to ∞(Σm=0 to ∞ 2-f(m,n)) ...

A user for a secure internet service has a 20 digit key phrase. The key phrase is known by the user only and each digit in the key phrase has a value 0-9. When the user attempts to log onto the secure service he/she is asked ...

what is the probability of getting two consecutive heads in five tosses of an unbiased coin ...

we have done a good amount of serious mathematics. just have a glimpse of mathematics humour ...

Planet X is a ball with center O. Three spaceships A, B and C land at random on its surface, their positions being independent and each uniformly distributed on the surface. Spaceships A and B can communicate directly by radi ...

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another brilliant one { only for those who now come to 12th class} {who are writing jee 2009, better leave this. u can sit on this after april 12. dont waste your time now.} Find all surjectyive functions f:N→N such that fo ...

The value of a2+b2+c2 where c=ab and a and b are consecutive integers is always c+1 (TRY IT OUT). This will be useful in vectors and 3-D to calculate the denominator in formula to find angle and to find easily unit vectors. P ...

A bag contains a coin of value M and a number of other coins whose aggregate value is m. A person draws one at a time till he draws the coin M. Find the value of his expectation. i like this problem , because its got a one li ...

There are 10 applicants for a job, labeled 1, 2, ... , 10. Their suitability for the job is ranked in this order (so 1 is more suitable than 2, who is more suitable than 3 and so on). But an applicant's ability is only measur ...

A bag contains 8 red and 5 white balls.Three balls are drawn at random.Find the Probability that All the three balls are white in solving this question i have a doubt can we take 5 white balls as identical or not.can u explai ...

GREATEST MATHEMATICAL JOURNAL OF THE WORLD http://annals.princeton.edu/issues/issues.html ...

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Let f(x) be a continuous and differential fn. (A) : There exists a 'c' in [2,6] such that (f(6))2 - (f(2))2 = 8f(c)f '(c) (R) : By LMVT, f(6) - f(2) = 4f '(c) for some 'c' in [2,6] and By IVT, f(6) + f(2) = 2f(c) for some 'c' ...

each packet of certain items contain a coupon which is equally likely to bear the letters a,n,s,h,u if m packets r purchased then how to find the probability that the coupons cannot spell ANSHU, how? hint ...

1. √cos2x 2. 1 1+x16 ...

1) x , y , z are +ve nos. such that x + y + z = 1 (A) : [ (1-2x)+(1-2y)+(1-2z) ]/3 ≥ [ (1-2x)(1-2y)(1-2z) ]1/3 (R) : For +ve nos. A.M. ≥ G.M. A,B,C,D have the same usual meanings. ...

this is a ques from the test forum a man has Rs390000 on retirement He gets Rs5000 per month as pension His expenditure of first month is Rs5000 and increases by Rs500 every month When he will be bankrupt Please solve it ...

Let f (x + y) = f (x) f (y) for all x and y. Suppose that f (3) = 3 and f '(0) = 11. Then f ' (3) is given by : opts are : 22,33,44, none of these.... Ans: I'm getting 33 but the ans reads none of thes ...

consider those functions f:N→N which satisfy the relation f(m+n)≥f(m)+f(f(n)) -1 for all natural numbers m,n. FIND ALL POSSIBLE VALUES OF f(2007) ...

∫ tanx ===[7][7][7] plz help meee.......... ...

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find all functions f:Q→R such that for all x,y ξ Q f(xy)=f(x)f(y)-f(x+y)+1 x,y ξ Q means for all x,y belonging to Q. ...