[Official] Quant Thread for 2015!

Ans for qn 42 is 1/6 right? But the key says it s 36 <smiley data-src="/emoji/disappointed.png" alt="disappointed" title="disappointed" class="emoji" data-sigil="lazyload emoji" data-cdn="sm"></smiley>

pls tell me with step  by step approach,


In how many ways we can select three letters from word INDIANS?

Thanks in advance 😃

if log 3=.4771 , then number of zeroes after the decimal point till the significant digit in 1/3^100 is?


Can someone explain how clock hands make an angle between 0 and 180 22 times in 12 hour period?

A three digit no N ends with the same no. of zeroes(atleast 1) in base 2,3,5 Find all possible values that n can take?

The smallest odd number that should be added to 2^2006 + 32^31^30 to make it divisible by 7? Can someone share their approach to this 

In a college of 525 students, each student takes atleast two items among vada,dosa,samosa and bread for his breakfast. if 375 like vada, 375 like dosa , 375 like samosa and 375 like bread then find the maximum number of students who take all the four items?

i gave the CAT mock test by IIM , but after the test was over , no scores were displayed. Where  do i see for  my scores ?

If a = x/ y+z, b = y/z+y, c= z/ x+y, then which of the following statement is/are true?
I. B+c-1/yz + a+c-1/xz + a+b-1/ yx=1
II. X²/a(1-bc) = y²/ b(1-ca) = z²/ c(1-ab)
III. (a+b)c+(b+c)a+(a+c)b= 2(x+y+z)(xy+xz+yz)-6xyz / (x+y)(y+z)(z+x)
a) I and II
b) I and III
c) II and III
d) None of these

A bookshelf contains 10 racks and each rack can hold one book.The racks are numbered 1 to 10 from left to right. In how many ways can 4 diff MBA books and 6 diff ENGG books be arranged in these racks, if none of the 4 MBA books can be placed in rack 9 or 10 and also no 2 MBA books can be together.?

one-fourth of a cerain journey is covered at the rate of 25 km/hr, one-third at the rate of 30 km/hr and the rest at 50 km/hr. find the average speed for the whole journey.

  • 1600/53 km/h
  • 1200/53 km/h
  • 600/53 km/h
  • 1800/53 km/h

0 voters

Does anyone have the detailed solutions of CAT 2012 paper? I just have the answer key and I feel some of its answers are wrong. :$

Two tanks, T1 and T2, of equal capacities, are provided with inlet taps, A and B, of different flow rates, respectively. Tap A begins to fill the first tank. Seven minutes later, tap B is opened. Nine minutes after that, the total quantity of water in the two tanks is just enough to fill one tank completely. Exactly t minutes after that both the tanks are full. What is the value of t

Ten soldiers are standing in a single row. Their commanding officer wants to select three of them for a special mission. If there have to be at least two soldiers standing between any two of the soldiers selected, in how many ways can the commanding officer select the soldiers?

Any alternative solution than TIME's solution ??

hey puys kindly explain the approach of this one.


http://imgur.com/qhd6C6P

In a coding language, Mumbai is written as 10110153. Pune is written as 121114. How would Bangalore be expressed?

  • 1511751221164
  • 15115592144
  • 1511651021144
  • 15118592112

0 voters

Ram and Suraj start running from point A on a circular track of 1,200 m. Ram runs at a speed of 12 km/hr and Suraj at a speed of 8 km/hr. They start running in opposite directions at the same time. When each of them reaches at point A for the first time, they reverse their directions along the track. In how much time after starting will they meet for the second time? (a) 7.2 min (b) 7.8 min (c) 10.8 min (d) 11.2 min (e) 9.4 min

which of the terms is 2^1/3, 3^1/4, 4^1/6, 6^1/8 and 10^1/12 is the largest?

I believe the answer is 3^1/4 but just want to confirm because the answer key says otherwise :$

  • 2^1/3
  • 10^1/12
  • 4^1/6
  • 3^1/4

0 voters

Can anyone explain why there is 4*(4-x)  ?

http://imgur.com/UvrroVy


if the roots of the equation (a^2+b^2)x^2 +2(b^2+c^2)x + (b^2+c^2) = 0 are real, then which of the following must hold true?

please explain as well. :slight_smile:

  • a^4<b^2(a^2+c^2)
  • c^2>a^2
  • c^4>a^2(b^2+c^2)
  • b^2>a^2

0 voters