Quant by Arun Sharma

MBA CAT 2024
6166
@smcetguy : faster boat upstream/downstream speed = sfu/sfd.
slower = ssu/ssd.

sfd = 1.5 ssd ....... (1)
sfd - 8 = ssd .........(2) distance traveled in one hour.

substitute and solve : sfd = 24/ ssd = 16.

time take by faster/time taken by slower = 1/2 => sfu = 2*ssu...........(3)

sfu - 8 = ssu .........(4) distance traveled in one hour.
substitute and solve : sfu = 16/ ssu = 8.

speed of faster in still water = (sfd + sfu)/2 = 40/2 = 20

6167
@abhijit111 I am also reading this book and I am also reading Arun Sharma's Verbal ability..and I must tell you I have met him and his wife Meenakshi personally..they came in our college fest and organized and aptitude exam and I was won among the top 30 finalist among the thousand participated in the event but could be the top 5 to have the privileged to ask my queries personally..I must tell you they are so down to earth and so knowledgeable..they will make you realize for what have you taken birth and what is actually being successful..it isn't about earning all your life..its something else..
6168
@sushmathakur said:
@abhijit111 I am also reading this book and I am also reading Arun Sharma's Verbal ability..and I must tell you I have met him and his wife Meenakshi personally..they came in our college fest and organized and aptitude exam and I was won among the top 30 finalist among the thousand participated in the event but could be the top 5 to have the privileged to ask my queries personally..I must tell you they are so down to earth and so knowledgeable..they will make you realize for what have you taken birth and what is actually being successful..it isn't about earning all your life..its something else..
@sushmathakur waise which book are u talking about ?? (the other book accept Arun Sharma's Verbal Ability)

Regards,
6169
A football and a tennis ball are such that the surface area of the football is 8 times greater than the surface area of the tennis ball. If the volume of the tennis ball is a% lower than the volume of the football, then what is the value of €˜a €™? (approx.)
6170
you mentioned you reading arun sharm's quants so i told i am reading verbal ability too given by arun sharma...
whats the confusion about it??
6171
@smcetguy : surface area (s.a) of tennis ball = 4pi r^2 ; s.a of football = 36pi r^2 [4 + 4*8].
radius of tennis = r ; radius of football = 6r.

(V football - V tennis)/V football = [(6r)^3 - r^3]/(6r)^3 = (215/216)*100 = 99.5 %.
6172
@Raghu5jan said:
P's present age is 4 yr. more than Q's age after six yrs. The sum of the present ages of P and Q together is 70 yr. What is the present age of Q ??1.) 32 yr. 2.) 30 yr. 3.) 34 yr. 4.) 40 yr.pls help me with the method to solve this sum..
I presume the fastest way to go about this question is by options...
Add 10 to the option to get P's present age. And the option again to get the sum of their present ages which shud be 70.

So, the answer is 2, I suppose.

6173
2ndApr2011 my reply was dedicated to abhijit111 as he started the thread...not to you..sorry if i created some misunderstanding for you or anybody else..
6174

Guys got a good q for u ::
arun sharma mensuration level 2 : q " 45 that q with equilateral triangle and 6 circles // .. lets see who can solve it ??

6175

Hi Puys , Im hvng prob in the percentage ques Ex:5 LOD2 q:2 , LOD1: Q 46 Can anyone explain it please .

In an examination , 48% students failed in Hindi and 32% in History, 20% failed in both the subjct. If the no. of student who passed the examination was 880 , hw mny students appeared in the exam ?

a>2000 b>2200 c>2500 d>1800 e>None of these.

Ans:b

6176
@DevilZone said:
Hi Puys , Im hvng prob in the percentage ques Ex:5 LOD2 q:2 , LOD1: Q 46 Can anyone explain it please .In an examination , 48% students failed in Hindi and 32% in History, 20% failed in both the subjct. If the no. of student who passed the examination was 880 , hw mny students appeared in the exam ?a>2000 b>2200 c>2500 d>1800 e>None of these.Ans:b
total fail percentage=48+32-20=60 %
=> Pass percentage=40%

=> total number of students appeared in the exam= 880/.4=2200
6177
@DevilZone said:
Hi Puys , Im hvng prob in the percentage ques Ex:5 LOD2 q:2 , LOD1: Q 46 Can anyone explain it please .In an examination , 48% students failed in Hindi and 32% in History, 20% failed in both the subjct. If the no. of student who passed the examination was 880 , hw mny students appeared in the exam ?a>2000 b>2200 c>2500 d>1800 e>None of these.Ans:b
%failed=60
pass%=40
no. of students appeared= 880/40/100=>2200
6178
@Rshmi05 said:
What will be the remainder when 10^10 + 10^100 + 10^1000 + ....10^10000000000 isdivided by 7
R=5
6179
39^29^23^19/59 R=?
6180
@viewpt said:
39^29^23^19/59 R=?
E(59)=58

29^23^19 mod 58
= 29*{ 29^(23^19-1) mod 2}
=29*(1 mod 2)
=29 mod 58

now, 39^29^23^19 mod 59
=39^29 mod 59
=(-20)*20^28 mod 59
=(-20)*(-8)^7 mod 59
=20*8*5^3 mod 59
=20000 mod 59
=58 mod 59

(Not a very convincing solution :embarrassed: )
6181
@viewpt said:
39^29^23^19/59 R=?

@vijay_chandola said:
E(59)=5829^23^19 mod 58= 29*{ 29^(23^19-1) mod 2}=29*(1 mod 2) =29 mod 58now, 39^29^23^19 mod 59=39^29 mod 59=(-20)*20^28 mod 59=(-20)*(-8)^7 mod 59=20*8*5^3 mod 59=20000 mod 59=58 mod 59 (Not a very convincing solution )

i had a doubt , sombody posted this, but this approach is very confusing

@vijay_chandola as you got 39^58 mod 59=1
39^29*2 mod 59=1

=> (39^29)^2 mod 59=1
=> 39^29 leaves either remainder 1 or -1 (58 in this case)

Do you know how to get to -1 or 1 ??
6182
@Raghu5jan said:
P's present age is 4 yr. more than Q's age after six yrs. The sum of the present ages of P and Q together is 70 yr. What is the present age of Q ??1.) 32 yr. 2.) 30 yr. 3.) 34 yr. 4.) 40 yr.pls help me with the method to solve this sum..
let q's age be x..after 6 years age will be x+6...so p's age is x+6+4=x+10

now...x+x+10=70
x=30
6183
@techsurge said:
i had a doubt , sombody posted this, but this approach is very confusing@vijay_chandola as you got 39^58 mod 59=139^29*2 mod 59=1=> (39^29)^2 mod 59=1=> 39^29 leaves either remainder 1 or -1 (58 in this case)Do you know how to get to -1 or 1 ??
I knew this method, but ATDH sir told once that you cannot reach to a particular solution from this stage. similar question was 41!^2 mod 83 :-/
If you're lucky enough then you'll see only one option (either +1 or -1) in question :P
6184
@vijay_chandola :WHO IS ADTH ??
6185

If a man walks to his office at 3/4 of his usual rate, he reaches office 1/3 of an hour later than usual. What is his usual time to reach office?

Pls let me know how much time does it takes to solve lod 1 of arun sharma of arithematic Geometry,P n C and probability