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The highest form of pure thought is in mathematics

Plato

maths is subject which is fun loving and which checks one ability logically

bharat ratna

Placed User Comments

M4Math helped me a lot.

Vipul Chavan 4 years ago

Thanks m4 maths for helping to get placed in several companies.
I must recommend this website for placement preparations.

yash mittal 5 years ago

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(8 years ago) "Other"

A tree of height 36mts at the edge of a road broke at certain height and it fell in such a way that its top touched the other edge of the road.If the breadth of the road is 12m,the the height at tree broke is ?
a)16 b)24 c)12 d)18

Reply Like? Yes (1) | No

(8 years ago) "Other"

7. A contractor agreed to finish a piece of work in 150 days. He employed 75 men and made them work for 8 hours per day. However, after 90 days, he realized that only 2/7th of the work was completed. How many more men would he need to employ to complete the work on time if he intended to make everybody work for 10 hours per day henceforth?

Reply Like? Yes (2) | No

(8 years ago)

let 1 man takes x hours to complete the given piece of work
then, work done by 1 man in 1 hour=1/x
work done by 75 such men in (8*90) hours=2/7
or (1/x)*75*8*90=2/7
or x=18900
now let y such men can complete the remaining work in 60 days working 10 hours a day
(y*10*60)/x=1-2/7
or (y*10*60)/18900=5/7
or y=225
number of additional men required=(225-75)=150 men

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(8 years ago) "Other"

The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players.Find the average age of new players?

Reply Like? Yes (2) | No

(8 years ago)

19yrs 11months

let average age of 11 players be x yrs and age of two new players be a & b yrs.
(11x-18-20+a+b)/11=x+2/12
11x-38+a+b=11x+11/6
a+b=11/6+38=239/6
(a+b)/2=239/12=19yrs 11months

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(8 years ago)

Two players of age 18 yr & 20 yr is replaced i.e. total 38 year age is replaced. Total average age is increased by 2 months & so total age increased of two men is 11× 2 =
22 months. So now total of both person = 38 yr 22 months
Hence their average = 19 yr 11 months

Like? Yes (1) | No

to (8 years ago) "Other"

Hiii preeti will u please tell.... me about how i clear the return test fot TCS

Reply Like? Yes (1) | No

to (8 years ago) "Other"

Hi, did you applied for TCS??

Reply Like? Yes (2) | No

(8 years ago) "Other"

A mixture of a certain quantity of milk with 16 litres of water is worth 90 P per litre .If pure milk be worth Rs. 1.08 per litre how much milk is there in the mixture?

Reply Like? Yes (1) | No

(8 years ago)

What is the ans abhiruchi.

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(8 years ago)

80 litre

cost of 1 litre of pure milk=Rs 1.08
cost of 1 ml of pure milk=Rs 1.08/1000
(1.08/1000)*x=0.9
x=2500/3
so 2500/3 ml of pure milk costs 90 P
also there is 500/3 ml of water in 1 litre of mixture
when water is 500/3 ml milk is 2500/3 ml
so when water is 16 litre milk is ((2500/3)/(500/3))*16=80 litre

Like? Yes (1) | No

(8 years ago) "Other"

please tell me what to prepare for TCS written exam??

Reply Like? Yes (1) | No

to (8 years ago) "Other"

Hi pooja
Are you placed in TCS??

Reply Like? Yes (1) | No

(8 years ago) "Other"

Tthe first 44integers are written in order to form the larger no. x= 123456789........424344.what is the remainder when x is divided by 45

Reply Like? Yes (2) | No

(8 years ago)

ans is 9

45=9*5
a number is divisible by 9 if its digital sum is divisible by 9
and a number is divisible by 5 if it ends with 0 or 5

1+2+3+.....+44=44(44+1)/2=990
9+9+0=18
1+8=9 which is divisible by 9

so x is divisible by 9

last digit of x/9 is 6 (since 9*6=54 or when 9 is multiplied by any number ending with 6, their product ends with 4)

when 6 is divided by 5 remainder is 1

so when x is divided by 45 the remainder is 1*9=9

this method works u can verify it by taking any other number which is divisible by 9 but not 5
eg: 423513/45
the last digit of 423513/9 is 7
when 7 is divided by 5 the remainder is 2
so when 423513 is divided by 45 the remainder is 2*9=18

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to (8 years ago) "Other"

sahitya CAN u please tell me how was the paper????

Reply Like? Yes (1) | No

(8 years ago) "Other"

a rectangular plot has a concrete path running in the middle of the plot parallel to the breadth of the plot. the rest of the plot is used as a lawn which has an area 240 sq. m. if the width of the path is 3m and the length of path is greater than its breadth by 2m what is the area of the rectangular plot?

Reply Like? Yes (1) | No

(8 years ago)

255 sq. m.
Area of the rectangular plot=Area of the lawn + Area of concrete path=240+ 3*(3+2)=255

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(8 years ago) "Other"

Find the missing number 32, 52, 74, 112, 135 ……………

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(8 years ago) "Other"

If AM=3, ARE=4, and NEVER=8, then
“INDIA IS A GREAT NATION” =:

Reply Like? Yes (1) | No

(8 years ago)

AM=1 13=total digits= 3
ARE=1 18 5=total digits= 4
NEVER= 14522518= total digits= 8
INDIA IS A GREAT NATION= 914491920171851211412191514
Total Digits= 27
so answer is 27

Like? Yes (3) | No

(8 years ago) "Other"

This app is super

Reply Like? Yes (1) | No

(8 years ago) "Other"

53,74,123,100,145,x.
What will be x

Reply Like? Yes (2) | No

(8 years ago)

x=78

53*1=53
37*2=(53-16)*2=74
41*3=(37+4)*3=123
25*4=(41-16)*4=100
29*5=(25+4)*5=145
13*6=(29-16)*6=78

Like? Yes (2) | No

(8 years ago) "Other"

in bankofficer selection exam 70% of successful students qualified in efficiency test and 65% in interview. if 27% were unsucessful in both exams,then how many students were sucessful in written exam

Reply Like? Yes (10) | No

(8 years ago)

Use Venn Diagram to solve this question.
If 27% were unsuccessful in both the exams this means 73% were successful.
then let x% be successful in both the exams
equation can be:
70 - x + x + 65 - x = 73
solving it we get , x = 62
thus 62% qualify both exams
so 70 - 62 = 8% students qualified only written exam and not interview.

Like? Yes (8) | No (1)

(8 years ago) "Other"

2 pipes can fill tank in 6 and 8 minutes. if those 2 taps are opened one by one for one minute each then how long it will tank for tank to fillup

Reply Like? Yes (1) | No

(8 years ago)

6 min. 45 sec.

In 2 min. tank will be filled (1/6)+(1/8)=7/24
So upto 6 min. filling =3*7/24=21/24=7/8, remaining=1/8
Again first pipe will fill remaining in (1/8)/(1/6)=3/4 min=45 sec.
So total time taken=6 min. & 45 sec.

Like? Yes (3) | No

(8 years ago) "Other"

Asha and nisha are two sisters who intend to meet their aunt who is 25 km away from them. Asha leaves home at 9am and walks at a spped of 4km/hr. while Nisha leaves at 11:30am on a bicycle at a speed of 9kmph. when does nisha meet asha?

pls solve dis prblm i need complete solution

Reply Like? Yes (1) | No

(8 years ago)

1:30 pm

Considering Asha and Nisha starts from same point in the same direction but at different times.
Starting at 9:00 am ,distance covered by Asha upto 11:30 am @ 4 km/hr=2.5*4=10 km.
At 11:300 Nisha started @ 9 km/hr, to meet Asha she has to cover the difference of 10 km. with relative speed of 9-4=5 km/hr, so after 10/5=2 hr. at 11:30+2=1:30 pm both will meet.

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(8 years ago) "Other"

for the igate exam how we need to prepare

Reply Like? Yes (1) | No

(8 years ago) "Other"

11. Select the option from below which best matches the statement mentioned below logically.
If you apply the formula, you can get your solution.

A. If you don’t use the formula you will not get your solution.
B. Using the formula is mandatory to get the solution.
C. If you have solved the problem, you have used the formula.
D. None of the above

Reply Like? Yes (1) | No

(8 years ago)

Correct answer is A

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(8 years ago) "Other"

10. Select the option from below which best matches the statement mentioned below logically.
If you have a suitcase with you, you are off to the railway station?
A. If you don’t have a suitcase with you, you are not heading towards the railway station.
B. If you have a bag with you then you are not off to the railway station.
C. If you are not heading towards a railway station you do not have a suitcase with you.
D. None of the above
can any one slove this problem and answer me

Reply Like? Yes (1) | No

(8 years ago)

For answering these types of question we follow complementary techniques.
Its correct answer is A.

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(8 years ago) "Other"

please anyone tell me for TCS pool campusing doing m4maths is enough?please help..please..please..

Reply Like? Yes (1) | No

(8 years ago) "Other"

m^4+m^-4=47 then m^1+m^-1=?

Reply Like? Yes (2) | No

(8 years ago)

3

m^4+(1/m^4)=47
m^1+m^-1=m+(1/m) , If m+(1/m) =x, then
[m+(1/m)]^2=x^2 , m^2+2+(1/m^2) =x^2 or m^2+(1/m^2)=x^2 - 2
Again [m^2 +(1/m^2)]^2=(x^2 -2)^2
m^4+2+(1/m^4) =x^4- 4x^2 +4
Given m^4+2+(1/m^4)=47, So x^4 -4x^2+4=47 or x^4 - 4x^2 - 45=0
Substituting x^2=a, to get quadratic equation, a^2- 4a -45=0 or (a+5)(a-9)=0, a=9
As x^2=a=9, x=3

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(8 years ago)

x=3,-3

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(8 years ago) "Other"

region 1999 2000 2001 2002 2003 2004
africa 26 27 28 29 31 33

america 122 128 120 115 113 126
asia 103 115 121 131 120 153
europe 381 393 391 400 396 415

middle east 21 24 24 28 30 36

During the period 1999-2004 from which region has the % growth of arrivals been highest?
During the period 1999-2004 from which region has the % growth of arrivals been lowest?
During the period 1999-2004 from which region has the growth of arrivals been highest?
in which year has the number of arrivals from all the regions the lowest?
in which year has the increase in total number of arrivals from all the regions the lowest?

plzzzzz solve this...who r experts

Reply Like? Yes (2) | No

(8 years ago)

Please solve this...

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(8 years ago) "Other"

If a number is to 7/9 of 35% of 900

Reply Like? Yes (1) | No

(8 years ago)

x=7/9 * 35/100 * 900
245?

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(8 years ago) "Other"

A man buys milk at 50 P. a litre and after adding water sells at 60 P. a litre thereby making a profit of 100/3 p.c.Find the proportion of water he has added.

Reply Like? Yes (1) | No

(8 years ago)

ans=1/9

let while selling x ml of milk is present in 1 litre of milk water solution
then, SP of x ml milk=60 P
CP of x ml of milk=(50/1000)x=x/20 P

(60-x/20)/(x/20)=1/3
1200/x=4/3
x=900

so 900 ml milk is present in 1 litre of milk and water solution
therefore 100 ml of water is there in solution

water:milk=1/9

Like? Yes (2) | No (1)

(8 years ago)

The answer given is 1:0.

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(8 years ago) "Other"

guyzz plz help me...
i got 85% in problem solving
70% in english
and 43% in quant
how to calculate total percentile and what are my chances????

Reply Like? Yes (1) | No

(8 years ago) "Other"

can anyone send TCS placement paper to this mail Id:
shahanaz375@gmail.com

Reply Like? Yes (1) | No

(8 years ago) "Other"

Anyone please daily update the TCS previous questions with solutions and puzzles also mainly e-mail attic ates also.
my mail id b.avinash777@gmail.com

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to (8 years ago) "Other"

hey bro can you please tell me the questions that were asked in TCS drive. PLZZZ mail me at.. veerbharti81@gmail.com

Reply Like? Yes (2) | No

to (8 years ago) "Other"

hi sis....... i think you are selected in sap interview. Am i right?

Reply Like? Yes (6) | No

(8 years ago)

hi....sister.......

Like? Yes (1) | No (1)

(8 years ago) "Other"

Find out wrong one: 2,3,12,36,86,167

Reply Like? Yes (1) | No

(8 years ago) "Other"

my amcat score is btwn 35 to 40 but i got 74.1 % in programming do i get call letters from companies?

Reply Like? Yes (1) | No

(8 years ago) "Other"

do anybody know which company is coming in Piet on 3rd Feb 2016

Reply Like? Yes (1) | No

(8 years ago) "Other"

5 xor 3 =34 and 6 xor 2 =40 then, the value of 7xor 1=?
a) 54 b)43 c)50 d)30

Ans: ?

Reply Like? Yes (1) | No

(8 years ago)

Ans=50
5^2+3^2=34
6^2+2^2=40
7^2+1^2=50

Like? Yes (2) | No

to (8 years ago) "Other"

josh.prince117@gmail.com
i want techmahindra placement papers

Reply Like? Yes (1) | No

(8 years ago) "Other"

How much cutoff in Tcs written exam?

Reply Like? Yes (1) | No

(8 years ago) "Other"

If a dealer gets x% on rs4000 and y% on remaining. If he gets commission of rs1270 on rs13000 and rs 830 on rs 9000. Find x%

Reply Like? Yes (1) | No

(8 years ago)

x=7

Commission on 13000=(4000*x/100) + (13000-4000)*y/100=1270 or 4x+9y=127 ---(i) &
Commission on 9000= (4000*x/100) + (9000-4000)*y/100 =830 or 4x+5y=83 ---(ii)
On solving (i) & (ii), x=7, y=11

Like? Yes (1) | No

(8 years ago) "Other"

16. A recent newspaper feature story listed several factors, as predictors of likelihood of premature death .Two of these factors were a sedentary life style without regular physical exercise, and sleeping more than 12 hours daily.If a person were to respond to this news by both joining as an exercise club and buying an alarm clock, that person would probably be
a. Mistaking an explanation for an argument
b. Mistaking an argument for an explanation
c. Mistaking a premise for a conclusion
d. Mistaking a cause for an indicator
e. Mistaking an indicator by a cause

Reply Like? Yes (1) | No

(8 years ago) "Other"

If the rate of change of y with respect to x is 5 and x is changing at 3 units per second, then y is changing faster than x.
true or false??

Reply Like? Yes (1) | No

(8 years ago)

true

dy/dx=5
dx/dt=3

dx=3dt
dy/(3dt)=5
dy/dt=15

so x changes 3 times in one second and y changes 15 times in one second

Like? Yes (3) | No

to (8 years ago) "Other"

hi...can u explain me how u take no-74 directly

Reply Like? Yes (1) | No

to (8 years ago) "Other"

Hey Bala.can u send me the qstns that u were going through before the tcs apptitude test..

Reply Like? Yes (1) | No

to (8 years ago) "Other"

hi kumari ,...wt r u dg?

Reply Like? Yes (1) | No

(8 years ago) "Other"

Cynthia and Reuben go to town to shop. Reuben purchases a hat and a
suite, which costs him 15 cents. Cynthia purchases a hat, the cost of
which is equal to Reubens suite. The rest of the money Cynthia spendsin buying a new dress. The new dress costs her one rupee more than
her hat. Cynthia says, if one and a half times money of hat, had we divided
unequally, we would had spent equal amount of money.
a) Reuben says," In that case", what is the cost of my hat?
b) How much money altogether they spent

Reply Like? Yes (1) | No

(8 years ago) "Other"

If y = f ( x )=( lx + m )/( nx - l ) then show
that f ( y )= x ??

Reply Like? Yes (1) | No

(8 years ago)

f(x) = (lx + m)/(nx-l)
y = f(x)
so
f(y) = f(f(x))
= f((lx + m)/(nx-l))
=( l(lx + m)/(nx-l) + m) / (n(lx + m)/(nx-l))x-l)
=( l(lx+m) + m(nx-l)) / (n(lx + m) - l(nx-l))
= (l^2 x +ml +mnx - ml) / (nlx + mn - nlx + l^2)
= (l^2 x +mnx) / (mn + l^2)
= x (l^2 +mn) / (mn + l^2)
= x
thus f(y) = x

Like? Yes (2) | No

(8 years ago) "Other"

56, 90, 132, 184, 218,?
(A) 368
(B) 316
(C) 362
(D) 326

Reply Like? Yes (3) | No

(8 years ago)

316
dividing each number of the series by 8 we get remainder as
0,2,4,0,2,4

Like? Yes (1) | No

(8 years ago) "Other"

1.
Alok and Bhanu play the following game on arithmetic expressions. Given the
expression
N = (
Θ
+ A)/B + (
Θ
+ C + D)/E
where A, B, C, D and E are variables representing digits (0 to 9), Alok would like to
maximize N while Bhanu would like to minimize it. Towards this end, they take turns in
instantiating the variables. Alok starts and, at each move, proposes a value (digit 0-9)
and Bhanu substitutes the value for a variable of her choice. Assuming both play to their
optimal strategies, what is the value of N at the end of the game? Also find a sequence
of moves (digits by Alok and variables by Bhanu) that would yield this value.
Note: Moves that lead to a divide-by-zero condition are disallowed. A non-optimal
sequence of moves is (5 → B, 6 → C , 3 → D, 2 → E, 0 → A) and the expression
evaluates to
Θ
/5 + (
Θ
+9)/2

Reply Like? Yes (5) | No

(8 years ago) "Other"

Hii guys does anyone has info regarding any upcoming offcampus of Infosys,cognizant or accenture at ncr for 2015 passouts. Will dere be offcampus drives for 2015 batch or not

Reply Like? Yes (1) | No (1)

(8 years ago) "Other"

x is positive
y=x-8
x^2=y^2
data suffi.

Reply Like? Yes (1) | No

(8 years ago)

for this use substitution method acc to information given
answer is x=4 and y= -4

Like? Yes (2) | No

(8 years ago) "Other"

TCS wen ll b announce the 23rd written exam result..............

Reply Like? Yes (1) | No

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