If a is a arithmetic mean and b, c be the geometric mean between any two positive numbers, then (b^3+c^3)/abc equals....?
Two lumps of gold and silver together weigh 20 kg. One lump contains 75% gold and 31.25 gm silver per kg. Another lump contains 85% gold and 30 gm silver per kg. The total quantity of silver in two lumps is 617.5 gm. If two lumps are melted to form one, then the percentage of gold in it will be...
Approach Plz...
Find the sum to n terms of 1 + 3x + 5x^2 + 7x^3 + .... , x not equal to 1.
Find all +ve integers n for which there are x & y such that
x+y=n^2
10x+y=n^3
2 persons P and Q started travelling from A and B which are 300km apart towards B and A respectively at 1pm. P travels at a constant speed of 30km/hr where Q doubles his speed every hour. If Q reaches A at 45/8hrs, at what time did P and Q meet each other?
A mixture of liquids A nd B contains 70% of B by weight. Liquid C is added till the final solution contains 12% by weight of A. What is the ratio (by weight) of B to C in the final mixture?
Friends pls expalin step by step
- 7:15
- 1:5
- 7:25
- 3:11
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Guys i am weak at Probablity/P and C, if anyone of you can suggest good source to practice apart from Arun sharma that would be of great help.
Hi folks. Anybody up for a study group? To analyze mocks and practice questions for CAT? NOIDA/ DELHI. Thanks!
In a rectangle of size 7 cm by 14 cm, quarter circles of radius 7 cm are drawn at each of the 4 vertices. What is the area of the rectangle which is not covered by any of the circles (in cm2)?
A) 2.17 B) 6.73 C) 4.76 D) 12.44
If the expression x^2 + 9 and x + 5 are to have a common odd factor other than 1 such that x is a natural number less than 301, then how many values of x are possible. A) 16 B) 17 C) 18 D) 15
Gcd of ((2^100) -1) and ((2^120)-1)
A 2^20-1
B 2^40-1
C 2^60-1
D 2^10-1
Please explain with reason
Any study group in Chennai for CAT'15?
A file of soldiers two - kilometer long is walking one behind the other at a uniform speed. An inspecting officer starts at the rear, moves forward till he reaches the front. Then he starts back with the same speed till he reaches the last man at the rear. When he gets to the last man, the last man has reached exactly the spot where the man at the front was when the officer started his inspection. What is the total distance travelled by the officer in this whole operation? A) 4.24km B) 4.42km C) 4.62km D) 4.82km
There is a staircase of 10 steps. In how many ways can person climb the staircase if he can take a maximum of 3 steps at a time?
Find all functions 'f' from R to R satisfying the relation
f(x^2 + yf(x)) = xf(x+ y).
A cistern has 3 pipes A, B and C, A and B can fill it in 3 and 4 hours respectively, and C can empty it in 1 hour. If the pipes are opened at 3 p.m., 4 p.m. and 5 p.m. respectively on the same day, the cistern will be empty at?
the correct answer is 7:12pm...approach please
https://books.google.co.in/books?isbn=8131733149
Excercise 3. question 1 to 4. How to approach this question from 2010 onwards. Thanks
A bag contains five 1 rupee coins, four 50 paise coins and seven 25 paise coins. Four coins are drawn from the bag one after the other
and every time a coin is removed, it is replaced with a 25 paise coin. What is the probability that the 1st, 2nd, 3rd and 4thcoins are 25 paise,
50 paise, 1 rupee and 50 paise coins, respectively?