@aashi6789 said:@iLoveTorres -it's a)0
Chck its 1
There are five cities in a state and each of them is to be connected to exactly two other cities using telephone lines. In how many ways can it be done?
@anuragu79 said:There are five cities in a state and each of them is to be connected to exactly two other cities using telephone lines. In how many ways can it be done?
is the answer 30?
@vbhvgupta said:no bhai, what i am saying is written is that work get doubles from the 2nd day onwards but that doesn't means that 1st day no work was done by the 1st man.
sorry bro my logic is wrong but answer is correct :P
@Exodia said:If S= 1/100 + 1/101 + 1/102 + .............. + 1/1000, then1) S 1Plz give answer along with explanation
Shld be Option(4). S>1
Here, AM > HM
=> (100+101+....+1000)/901 > 901/[(1/100) + (1/101) +.....+ (1/1000)]
=>[1001*(1000/2) - 99*(100/2)]/901 > 901/S
=>(9911*50)/901 > 901/S
=>S > (901*901)/(9911*50)
=> S > 1 [Aprroximately]
@vbhvgupta said:
1/64*16=1/4 wrk done by david
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
@aashi6789 said:Hi Puys,Help me solve this question:1- If x and y are even integers,then the number of solutions of x^2-y^2 = 7389746232 isa)0 b)1 c)2 d)more than 2
let the two no be 2a and 2b so you wil get (2a+2b)(2a-2b) but essentially it is even*even(i.e even +even= even and even -even = even) so by observing the factors of the number you will find that the number can be written as 4*1847436558 so this is of the form even*even
hence 1.
hence 1.
@vbhvgupta said:
1/64*16=1/4 wrk done by david
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
@aashi6789 said:Hi Puys,Help me solve this question:1- If x and y are even integers,then the number of solutions of x^2-y^2 = 7389746232 isa)0 b)1 c)2 d)more than 2
let the two no be 2a and 2b so you wil get (2a+2b)(2a-2b) but essentially it is even*even(i.e even +even= even and even -even = even) so by observing the factors of the number you will find that the number can be written as 4*1847436558 so this is of the form even*even
hence 1.
hence 1.
@aashi6789 said:@ishu1991 - I checked again... The answer is 0... share your approach please...
chck difference between P and T
@vbhvgupta said:Post ur approach
1/64*16=1/4 wrk done by david
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
so 16 days
now 1/64+1/32=3/64
3/64*no of days =1/4
so no of days 16/3
here 1/4 because we have to cmplete half og wrk 1/4 is already done
now 1/64+1/32+1/16 =7/64
7/64* no of days =1/4 no of days 16/7
1/4 because 3/4 wrk is to be done and 1/2 is alraedy cmplted
now 1/64+1/32+1/16+1/8=15/64
15/64* no of days =1/4
no of days 16/15
here 1/4 because 3/4 part is done
now add 16+16/3+16/7+16/15
u will get option D
@ishu1991 i got 16+16/3+16/7+16/15 only but last option nahi mil raha hai 
calculation mistake :banghead:
calculation mistake :banghead:
@pakkapagal said:A boat is to be manned by 8 men of whom one cannot row on boat side and two cannot row on the stroke side.In how ways can the crew be arranged?2880,1440,4320,5760
each side can be arranged in 4! ways
so 4!*4!*5C3 = 5760
@chandrakant.k said:@ishu1991 i got 16+16/3+16/7+16/15 only but last option nahi mil raha hai calculation mistake
ya u ar doin calculation answer is cmn d only
16+5.3+2.3+1.06=24.66
16+5.3+2.3+1.06=24.66
In a school of 100 students, 70 play Hockey, 60 play Tennis and 55 play Football.
What is the max number of sudents who play all 3.?
And what is the minimum.?
Is there any trick.? Plz explain
@Unternehmer said:Guys...please help me with these doubts.......
1)A regular polygon has each interior angle equal to twice its exterior angle. Find the number of diagonals in it.
a.5
b.8
c.6
d.9
2)A circular track is 400 m long. A, B and C run in the same direction along the track. They take 50 seconds to meet each other for the first time. If the ratio of their speeds is 4: 2 :1 find the time taken by C to complete a round.
a.100 seconds
b.75 seconds
c.50 seconds
d.60 seconds
3)In a machine a series of words is fed in which then gives an output after following a certain number of steps.
Input: Sale Fake Hence Gate His
Step 1: Sale His Fake Hence Gate
Step 2: Sale His Hence Fake Gate
Step 3: Sale His Hence Gate Fake
Step 3 is the output.
What will be the second step if the input to the same machine is
Input: Play Hope Greece Soul Watch
a.Soul Watch Play Hope Greece
b.Watch Soul Play Hope Greece
c.Watch Play Hope Greece Soul
d.Watch Soul Play Greece Hope
5)How many such pair of letters are there in the word PAMPHLET which have as many letters between them in the word as in the English alphabet?
a.0
b.1
c.2
d.3
2) the time taken by them for first meet.
lcm {400/(4x-2x) 400(x)} = 50
lcm {400/2x , 400/x} = 50
lcm {200/x , 400/x} = 50
{400/x) = 50
so x = 8m
so C would take 400/8 = 50secs
3) it will be watch sould play hope Greece
in thsi method they are arranged in reverthey are arranged in reverse alphabetical order
4) 0
as none of the words here have same number of words between them as in ebglish words
another appraoch is look at the options.
say if therre are 2 letters
say a and e
so the remaining letters PMPHLT can be arranged in many pairs which is obviously greater than all the options
@pyashraj said:Shld be Option(4). S>1Here, AM > HM=> (100+101+....+1000)/991 > 991/[(1/100) + (1/101) +.....+ (1/1000)]=>[1001*(1000/2) - 99*(100/2)]/991 > 991/S=>(9911*50)/991 > 991/S=>S > (991*991)/(9911*50)=> S > 1 [Aprroximately]
OA: d) S>1
Fourteen fruits and twenty two flowers are to be distributed among 10 people in such a way that
each person gets something. Anyone who gets more than two flowers cannot get more than one
fruit and anyone who gets more than one fruit cannot get more than three flowers. What is the
maximum number of flowers that one can get?
(a) 3 (b) 5 (c) 19 (d) 22
Plz give answer alongwith explanation
each person gets something. Anyone who gets more than two flowers cannot get more than one
fruit and anyone who gets more than one fruit cannot get more than three flowers. What is the
maximum number of flowers that one can get?
(a) 3 (b) 5 (c) 19 (d) 22
Plz give answer alongwith explanation