Let f (x) be a polynomial of degree 2012 satisfying f (k) = 1/k for 1
Two 12 hour clocks:P &Q; are set to show the correct time at 2'O clock in the afternoon. P gains time and Q loses time such that P gains 2 minutes for every 1 minute lost by Q. After some time before midnight on the same day if P and Q show 11'o clock and 8'o clock respectively, then what will be the time shown by P when both clocks show the same time again for the first time?
Plz explain, unable to solve clock problems like these.
Which is larger ... 99^11 + 100^11 or 101^11 ?
Any Aspirant Cat2013 from FARIDABAD interested in group studies ?? 
dere are 5 red and 4 black shoe. they have all got mixed up with each other. what is the probability of getting a matched shoe if two shoes are drawn at random?
1) A person draws a card from a pack of 52 replaces it and shuffles it. He continues doing it until he draws a heart. What is the probability that he has to make 3 trials?
2) What is the probability if he does not replaces the card
Find the probability that a year chosen at random has 53 mondays
koi basic se bata do isko plz,i am weak in this concept
By selling 200 oranges at 32 for a rupee, a man lost 40 %. How many for a rupee must he sell so as to gain 20 %?
A six-digit natural number abcdef becomes defabc upon being multiplied by a natural number. Find the sum of its digits if they are distinct.
20
24
27
36
Let S be the set {1, 2, 3, . . ., n} consisting of the ο¬rst n positive integers. What is the maximum value of n for which every 100-element subset of S contains two integers which differ by 25 ?
For how many prime pairs (p, q) does there exist an integer n such that
(p^ 2 + 1 )(q^ 2 + 1 ) = n^ 2 + 1 ?
A helicopter is in a stationary position at a certain height over the lake .At a point 200 m above the surface of the lake ,the angle of elevation of the helicopter is 45 degree.At the same time,the angle of the depression of its reflection in the lake is 75 degree.Calculate the height of the helicopter from the surface of the lake.
PQ is a chord of 6cmof a circle of radius of 5cm.Tangents to circle at P and Q meet at T..find lenght of TP..
4.75
3.75
2.75
Sorry its cm and not com
A helicopter is in a stationary position at a certain height over the lake .At a point 200 m above the surface of the lake ,the angle of elevation of the helicopter is 45 degree.At the same time,the angle of the depression of its reflection in the lake is 75 degree.Calculate the height of the helicopter from the surface of the lake.
DE = x ; EF = y
BDE similar to EFG
=> 200/x = h/y ---1
from the fig
x + y = h - 200
using 1 =>
y = h(h -200)/(h+200)
tan 75 = 2 + rt(3) = h / y
=> h = 300 rt(3)
EDIT : h = 200 rt(3)
made a calculation error
@mailtoankit @psk.becks isme koi ghalti hai?
If a trader increased the discount offered on an article by 15 percentage points, the profit he makes on it would decrease by 37.5 percentage points. What is the ratio of his cost price to that of the marked price?
2 : 3
2 : 5
3 : 5
3 : 2
An advertising board has 8 display panels of uniform dimensions in a row. Advertisements of 5 different brands of perfumes are to be displayed on the board. In how many different ways can the advertisements of these 5 brands be displayed on the board so that each display panel has one advertisement displayed on it and each brand is displayed on at least one panel?
126,000
58
92,400
9080
Q. a motorboat went downstream for 28 km and immediately returned. it took the boat twice as long to make the return trip. if the speed of the river flow were twice as high, the trip downward and back would take 672 minutes. find the speed of the boat instill water and also speed of river flow
a. 9k/h 3k/h
b. 9,6
c. 8,2
d. 12,3