Official Quant Thread for CAT 2011 [Part 3]

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please continue the quant discussions in this thread : previous threads : http://www.pagalguy.com/forum/quanti...at-2011-a.html (Official Quant Thread for CAT 2011 ) http://www.pagalguy.com/forum/quantitative-questions-and-answers/...
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Puys Please continue here..
Official Quant Thread for CAT 2011
http://www.pagalguy.com/discussions/official-quant-thread-for-cat-2011-part-4-25070678/2874214
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the number 916238457 is an example of a nine-digit number which contains each of the digits 1 to 9 exactly once. It also has the property that the digits 1 to 5 occur in their natural order, while the digits 1 to 6 do not. How many such numbers are there?

Off for some vocab



9c5*4!

sry.. from this we have to subtract cases where 12345 and 6 are in the accending order....
MICA PGDM(C) 2012-2014
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This thread is now Officially closed...koi band kar do bhai

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This thread is now Officially closed...koi band kar do bhai

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1 comes before 2
2 before 3 and co on

6 out of series haii


no. of ways of selecting 5 places in 9 places = 9C5

in this in the number of cases in which 6 is right to 5 has to be subtracted...
if 5 in 5th place 4 case
if 5 in 6th place 5C4*3 cases
if 5 in 7th 6C4*2
if 5 in 8th 7C4...

9C5= 126
126- (4+ 15 + 30 + 35) = 42... i think sum mistake myt hav crept in please let me know..
XLRI B.M 2014-2016 S.B.I P.O 2013 batch UDT 2013 KDT 2012
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from arun sharma:-
what is the remainder when (1!)^3+(2!)^3+(3!)^3+..............+(1152!)^3 is divided by 1152?

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Q.Tap A fills water in a tank in 8 hrs, tap B fills the same tank with milk in 10 hrs. A man who wanted to fill the tank with water and milk ,starts tap A
in a tank containing milk up to 5% of tank capacity initially.After 4 hrs ,he starts tap B till the tank gets filled completely. In what proportion should he mix this solution with the other one containing water and milk in the ratio 1:3?
a)1:1
b)1:2
c)2:1
d)1:3 (correct option)


take capacity of 80ltrs

efficiency of tap A(water)=10ltrs/hr
efficiency of tap B(milk)=8ltrs/hr

5% of 80=4(milk containing tank)

In 1st 4hrs tap A threw 40ltrs of water,36 short to fill the tank completely
In next 2hrs tank will get completely filled

now,total milk in tank=4+8+8=20
water=60
ration=water:milk=3:1

after this dont understand what the question is??
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pandit jii Says
bhaii sab log humara swaal kyun nazar andaaz kar dete haii :splat::splat::splat:


Hi,
My take to your question is
5,7,8,9 should come after 1,2,3,4,6.
So, arrange all the numbers i.e. 9! and divide it by the numbers at the right.

Answer is 9!/4!

Is it correct, puys?
If it does not kill you, it makes you stronger.
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Gudbye Thread !!!

**Sorry to spam
Koshti Se Dosti kardala toh Life Jhingalala :)
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