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santosh to RAKESH 10 years ago

To completely fill a half filled tank, tap x is opened and the tank is fully filled in 20 hours.
But after 4 hours, the power goes off. Before the power came, exactly half of the water,
which was in the tank, had been used. How much time would it take now to fill the tank
completely?
8 hours
10 hours
13 hours
16 hours
15 hours

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santosh to RAKESH 10 years ago

a quadrilateral PQRS circumscribes a circle with centre o,it is given that PQ is parallel to RS.Also length of PQ is thrice that of RS while length of QR and PS are equal.however QR and SP are not parallelto each other.the perimeter of the quadrilateral is equal to the perimeter of a square with area 36sq.m,what is the area of the quadrilateralPQRS in sqm(approx)??

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santosh to RAKESH 10 years ago

how many no can be formed using digits (1,2,3,4,5,6,7,8,9)..such that they are in increasing order(eg:0 12345,345,6789,123456789)???

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amar kumar 10 years ago

0,1,12,123,1234,12345,123456,1234567,12345678,123456789,23,234,2345,23456,234567,2345678,23456789,34,345,3456,34567,345678,3456789,45,456,4567.45678,456789,56,567,5678,56789,67,678,6789,78,789,89,2,3,4,5,6,7,8,9.......................... 46no

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RAKESH 10 years ago

single digits cant be cosidered in inc order
1+2+3+.........+8 = 36

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santosh to RAKESH 10 years ago

A deck of 5 cards (each carrying a distinct number from 1 to 5) is shuffled thoroughly. Two cards are then removed one at time from the deck. What is the probability that the two cards are selected with the number on the first card being one higher than the number on the second card?

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RAKESH 10 years ago

n(s) =5*4
n(e)= {(2,1),(3,2),(4,3),(5,4)} = 4
p = 1/5

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santosh to RAKESH 10 years ago

You have 3bags each containing two marbles.bag A contain 2 white marbles , bag B contaion 2 black marbles,bag C contains one white marble and one block marble. You pick a random bag and take out one marble.it is a white marble.probability that the remaining marble from the same bag is also white ?

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RAKESH 10 years ago

bag can be A or C
1st is white so 2nd can be w/b so p =1/2

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santosh to RAKESH 10 years ago

Abhishek and Aishwarya picked up a ball at random from a bag of M red colour and N yellow coloured balls,one after the another, replacing the ball every time till one of them gets a red ball.The first one to get a red ball is declared as a winner.IF Abhishek wins the game and odds in favour of his winning the game is 3/2 find the ratio of M/N
A)1:1
B)1:2
C)2:3
D)3:2

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santosh to RAKESH 10 years ago

1/a - 1/b = 1/c where a,b,c are single digit number and b > a . Then we have to find how many values are possible for a,b,c as per the given conditions..?

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RAKESH 10 years ago

if a.b, c are distinct then
a=bc/(b+c)
two soln (2,3,6)&(2,6,3)

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santosh to RAKESH 10 years ago

assertion reasoning question
ques 1 is x integer
1) x/2 is integer
2) 2x is integer

ques 2 there are three consecutive prime number p,q,r, such that q-p=2 what is the value of r
1)their median is the average of 3 prime number .
2) sum is 15

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RAKESH 10 years ago

1) only 1 is suffice
x must be even integer.
2x=5 then x not integr.

2) either suffice
must be 3,5,7

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santosh to RAKESH 10 years ago

Three numbers A,B,C are such that the difference between the highest and the second highest two-digit numbers formed by using two of A,B and C is 5.Also ,the smallest two two-digit numbers differ by 2.If B>A>C then what is the value of B?

(a)1 (b)6 (c)7 (d)8

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RAKESH 10 years ago

BA-BC=5 => A-C=5
CB-CA=2 => B-A=2
adding weget, B-C = 7 => B > 7
from options B= 8 is possible.

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santosh to RAKESH 10 years ago

How many 4 digit numbers can be formed using digits 0,1,2,3,4,5, such that number is divisible by 8??

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santosh to RAKESH 10 years ago

There is a circular table. It has 60 chairs. Drakula came and sit on a chair beside another person. What is the minimum no. of person will be so, that wherever he sits he always gets to sit beside a person

Options: 30, 20, 15, 10

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RAKESH 10 years ago

if thre r 6 chairs then
m _ _ m _ or _m_ _ m _ etc in each case mimn number of men = 6/3 = 2

for 60 chairs 60/3 = 20

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santosh to RAKESH 10 years ago

A lady bought five books namely A,B,C,D,E to distribute her 3 child. How many ways she can distribute books?

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Devendra Marghade 10 years ago

60

With A,B combinations C or D or E are possible, with A,C combinations B or D or E are possible, with A,D combinations B or C or E are possible, with A,E combinations B or C or D are possible
So total 12 combinations for A are possible for selecting 3 among 5 like (A,B,C), (A,B,D), (A,B,E), (A,C,B), (A,C,D), (A,C,E), (A,D,B), (A,D,C), (A,D,E), (A,E,B), (A,E,C), (A,E,D)
Similar 12 combinations are possible for remaining 4
So total ways=5*12=60

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santosh to RAKESH 10 years ago

P is an even number (I think greater than 2 it was given). e is the probability of number of even numbers divisible by p, o is the probability of number of odd number divisible by p and w is the probability of number of whole numbers divisible by p. Then which equation satisfies.
1. w=2 e
2. w=e/2
3. w=o/2
4. not remember

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RAKESH 10 years ago

p = ???
odd num cant be divid y even so o =0

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santosh to RAKESH 10 years ago

ABC is a right-angle triangle with sides R1, R2 and R3 such that no sides are even simultaneously. If 102 is added to all sides and then squared we get S1, S2, S3 (Sn=square of (Rn+102)). If T= S1+S2+S3.
Then, which is always true for T.
1. divisible by 2 but not by 4
2. divisible by 4 not by 8
3. divisible by 8 not by 4
4. none of the above

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RAKESH 10 years ago

as given condn 2 of R1, R2 and R3 will be odd nos
consider tr (3,4,5)
then T = (3+102)^2 + (4+102)^2 + (5+102)^2
= (3^2+4^2+5^2)+ 3*102^2 + 2*102*(3+4+5)
its clear that
T is always divisible by 2 but not by 4

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santosh to RAKESH 10 years ago

how many number have ever decreasing digits (eg.98640 or 732 or 81)? please note that none of the following are ever decreasing numbers 2 or 9 or 12 or 443 or 5298..
a.10!/9
b,2!/1+3!/2..........+9!/8+10!/9
c.2!/2+3!/2..........+9!2+10!/2
d.2^10-11

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RAKESH 10 years ago

9876543210
chose any 2,3,4......,9,10 numbers
10c2 +10c3 + .......+ 10c10 = (2^10-11)

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santosh 10 years ago

thank you rakesh ..for the help

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santosh 10 years ago

A)1:1
B)1:2
C)2:3
D)3:2

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santosh 10 years ago

Abhishek and Aishwarya pick up a ball at random from a bag containing M red and N yellow colored balls, one after the other, replacing the ball everytime till one of them gets a red ball. The first one to get a red ball is declared the winner. Of Abhishek begins the game and the odds in favor of his winning the game are 3 and 2, then find the ration M,N.

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