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There r few things whch we knw whch r nt capable of mathmatical reasoning nd when these can nt it is a sign dt our knowledge of them is very smal nd confusd nd where a mathmaticl reasing can be had . It is as dark a foly to make use a candle stick as to g

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[G]eometry is not true, it is advantageous.

~Henri Poincaré

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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"

In a staircase , there are 10 steps . A child is attempting to climb the staircase. Each time, she can either make 1 or 2 steps. In how many different ways can she climb the staircase?

option
a)10 b)21 c)26 d)None of these

Reply Like? Yes (2) | No

(8 years ago)

Use fibonnacci series, with starting two terms as 1, 2. So next terms are 3, 5, 8, 13, 21, 34, 55, 89. Answer is 89.
So ans is option d

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(8 years ago)

answer fo above question is 10.

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(8 years ago) "Other"

how we Adding a bar over a letter ?

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(8 years ago) "Other"

Did any one received the TCS admit card, please answer?

Reply Like? Yes (1) | No

(8 years ago)

Yes , Be Confirm, had you clicked on "Apply on off campus drive"?

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to (8 years ago) "Other"

Q: If a clock takes seven seconds to strike seven, how long will it take to strike ten ? I NEED COMPLETE SHORTCUT METHOD

a) 7 b) 10 c) none

Reply Like? Yes (1) | No

(8 years ago)

Seven strikes of a clock takes 6 intervals so 10 strikes will take 9 intervals
Required time=(7/6)*9 seconds =10(1/2) seconds.
So, answer is c) none

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(8 years ago) "Other"

Q. Andalusia has been promoting the importance of health maintenance. From January 1,1991 to January 1,1993, the number of people enrolled in health maintenance organizations increased by 15 percent. The enrollment on January 1,1993 was 45 million. How many million people(to the nearest million) was enrolled in health maintenance organizations on January 1,1991?

A. 33. 73 million
B. 37.5 million
C. 39.13 million
D. 40 million

Reply Like? Yes (2) | No

(8 years ago)

using the formula P/(1+R/100)^n
present population p=45 million,n= 2 years ago,R=15
45/(1+15/100)^2=34.0264650284

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(8 years ago)

#Suman your answer is wrong

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(8 years ago) "Other"

no of zeroes in 11*22*33484844943

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(8 years ago) "Other"

in website all paper and his trick is best...

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(8 years ago) "Other"

The population of a village is 10000. In one year, male population increase by 6% and female population by 4%. If population at the end of the year is 10520, find size of male population in the village (originally).

Reply Like? Yes (1) | No

(8 years ago)

6000

let total number of male in the village be x
then total number of female in the village=10000-x
according to question:
1.06x+1.04(10000-x)=10520
1.06x+10400-1.04x=10520
0.02x=120
x=120/0.02=6000
thus size of male population in the village is 6000 (originally)

Like? Yes (1) | No

(8 years ago) "Other"

please answer this question........

A circular cylinder of internal diameter 8cm and height 10cm contain water to a depth of 6cm.Two solid lead sphere each of diameter 4cm are placed in it.Find height by which water level rises.
a)1cm
b)0cm
c)2cm
d)1 1/3 cm

Reply Like? Yes (2) | No

(8 years ago)

d)1 1/3cm

volume of water=pi*(4^2)*6=96pi cubic cm
volume of solid lead sphere=(4/3)*pi*(2^3)=(32/3)pi cubic cm
total volume of water with two solid sphere=96pi+2*(32/3)pi=(352/3)pi cubic cm
pi*(4^2)*h=(352/3)pi
h=22/3
height by which water level rises=22/3-6=4/3=1 1/3cm

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(8 years ago) "Other"

" Do not linger to gather flowers to keep them, but walk on, for flowers will keep themselves blooming all your way "

Reply Like? Yes (5) | No

(8 years ago) "Other"

9. All faces of a cube with an eight - meter edge are painted red. If the cube is cut into smaller cubes with a two - meter edge, how many of the two meter cubes have paint on exactly one face?

Reply Like? Yes (1) | No

(8 years ago)

24 cubes

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(8 years ago) "Other"

hiii every one dis is raji

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(8 years ago) "Other"

In this question A^B means A raised to the power of B.
Let F(X)=1+X+X^2+......X^6. The remainder when F(X^7) is divided by F(X) is ?

Reply Like? Yes (1) | No

(8 years ago) "Other"

Cost of two watches are in the ratio of 16:23. At present the cost of first watch increased by 100 and that of second by Rs 477. Now their ratio of the cost is 11:20. What were the initial prices of two watches ?

Reply Like? Yes (1) | No

(8 years ago)

Rs. 775.4 , 1114.64

If present initial prices or costs of two watches are 16x and 23x respectively, then
(16x+100) / (23x+477) =11/20
320x+2000 =253x+5247 , x=3247/67
So initial prices are 16x=16*3247/67=775.4 and 23x=23*3247/67=1114.64

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(8 years ago) "Other"

Reply Like? Yes (2) | No

(8 years ago) "Other"

Roy is now 4 years older than Erik and half of that amount older than Iris. If in 2 years, Roy will be twice as old as Erik, then in 2 years what would be Roy’s age multiplied by Iris’s age?

Reply Like? Yes (1) | No

(8 years ago) "Other"

Hello Friends...
I am from b.tech 2016 batch...I have 74 in 10th,59% in 12th(aggregate) from ISC board...in B.Tech till now 7.5...I will eligible for TCS offcampus drive......???.....pls reply Sir.....Thank you..

Reply Like? Yes (1) | No

(8 years ago)

no u have to have 60% throughout in 1st attempt irrespective of board
u can apply for wipro they demand 60% in 10th, 50% in 12th and 65% in btech

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to (8 years ago) "Other"

hiiiiiiiiiiiiiiiii

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(8 years ago) "Other"

hai friends how are you

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(6 years ago)

A alone can do 1/4th of the work in 2 days. B alone can do 2/3th of the work in 4 days. if all the three work together, they can complete it in 3 days so what part of the work will be completed by C in 2 days
.please answer to this question

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(8 years ago) "Other"

How many 15 rs , 1 rs and 25 paise coin will make 100 rs and number of coins should also be equal to 100 ?

Reply Like? Yes (1) | No

(8 years ago)

3 ,41, 56

If number of coins of 15 Rs=x, 1 Rs=y and 25 paise=z, then
15x + y + (z/4) =100 ---(i) &
x + y+ z= 100 ---(ii)
On subtracting (ii) from (i), 14x+(z/4)-z =0 or x=3z/56
For x to be positive and for minimum value of z=56, x=3, so y=41

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(8 years ago) "Other"

HEY friends thanks for sharing placement questions.give your valuable suggesion and tips who has clear aptitude test because we are going to appear in off campus drive on 2nd of march....thnku

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(8 years ago) "Other"

Hi..Guys. I will be sitting for co cubes exam next month. Is there anyone who gave co cubes previously ? Well I would like to know about the coding section in where we have to run a program in a language of owns choice. Basic idea on type of codes given. Is it hard ??

Reply Like? Yes (1) | No

(8 years ago) "Other"

The compound interest on a certain sum for 2 years is Rs 40.80 and the simple interest is Rs. 40.Find the rate p.c. ?

Reply Like? Yes (1) | No

(8 years ago)

4% p.a.

pr(2)/100=40
p=2000/r.....(1)

p[(1+r/100)^2-1]=40.80
p[(100+r)^2/10000-1]=40.80
p[(10000+r^2+200r)/10000-1]=40.80
p[(r^2+200r)/10000]=40.80
(2000/r)[(r^2+200r)/10000]=40.80.....from(1)
(2000r+400000)/10000=40.80
2000(r+200)=408000
(r+200)=204
r=4

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to (8 years ago) "Other"

r u not selected :B

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to (8 years ago) "Other"

i am anand from madurai.i am doing final year engineering. i need your contact mail id for some clarification.please cocidered me

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(8 years ago)

For any clarification mail me at janarthanan.ram@gmail.com

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(8 years ago) "Other"

A sum of money placed at compound interest doubles itself in 4 years .In how many years will it amount to eight times itself?

Reply Like? Yes (2) | No

(8 years ago)

12 years

amount=p(1+r/100)^n.....(1)
according to question:
p[(1+r/100)^4]=2p
let (1+r/100)=X
p*X^4=2p
X^4=2
cubing both sides
(X^4)^3=2^3
X^12=8
p*X^12=8p
p[(1+r/100)^12]=8p.....(2)
comparing (2) with (1),
n=12

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(8 years ago) "Other"

Hi can any one say what is best to prepare for techmahindra offcampus referral drive reply soon

Reply Like? Yes (1) | No

(8 years ago) "Other"

Pls send techmahindra previous year written test papers and essay questions to kavadapumounika@gmail.com

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

(8 years ago) "Other"

How many 3/8 are there in 14 7/8?

Reply Like? Yes (4) | No

(8 years ago)

let x 3/8 are there in 14 7/8
14 7/8=119/8
(3/8)*x=119/8
x=39 2/3

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(8 years ago) "Other"

The simple interest on a sum of money is 1/9 of the principal ,and the number of years is equal to the rate percent per annum.find the rate percent.

Reply Like? Yes (1) | No

(8 years ago)

let principal=p
then according to d ques S.I=p/9
and
t=r

then
s.i=p*t*r/100

p/9=p*r*r/100(as t=r)
1/9=r^2/100
taking sqr root
1/3=r/10
then r=10/3=3.33

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(8 years ago) "Other"

What is the last two digit of 123^123 and how

Reply Like? Yes (1) | No

(8 years ago) "Other"

What is the last two digit. Of 123^ 123!

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(8 years ago)

X=(123)^(123!)

The last digit of X is D.
D = X mod 10 = (123 mod 10)^(123!) mod 10 = 3^(123!) mod 10

Take the powers of 3:
3^0 = 1 mod 10
3^1 = 3 mod 10
3^2 = 9 mod 10
3^3 = 27 = 7 mod 10
3^4 = 81 = 1 mod 10
After this, the numbers will repeat.

So 3^(4*n) = 1 mod 10 for all positive integers n.
And 123! is 4*n

So D = 3^(4n) mod 10 = 1

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(8 years ago) "Other"

92,618,7672,47938,.........next number ??

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(8 years ago) "Other"

what is the solution to this problem
a b c are non zero real numbers such that ab/(a+b = 3 bc/(b+c)=4 and ca/(c+a)=5 if abc/(ab+bc+ca)=m/n where m and n are relatively prime positive integers find m+n

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to (8 years ago) "Other"

bunkar.abhi@gmail.com
plz send me tech mahindra sample paper

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(8 years ago)

N.saimanoj1994@gmail.com

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(8 years ago) "Other"

The sum of the ages of Abigali, Jennifer and Margarent was 52, three years ago. Four years ago, Jennifer, who is a younger than Margaret, was 11/2 times as old as Abigail. The sum of the ages of Jennifer and Margaret two years hence will be?

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

(8 years ago) "Other"

The ratio of the ages of Aunt Agatha and Uncle Roger is 5:6, the same a the ratio of the ages of their children, Suzanne and Bernard. If the sum of the ages of Suzanne and Aunt Agatha, five years ago was 60, what will be the sum of the ages of Bernard and Uncle Roger five years hence?

Reply Like? Yes (2) | No

(8 years ago)

94 years

If present ages of Aunt Agatha=A, Uncle Roger=R, Suzanne=S, Bernard=B, then
A/R=5/6 ---(i) & S/B=5/6 ---(ii)
Given (A-5) + (S-5)=60, S+A=70 ---(iii)
From (i) 6A=5R & from (iii) A=70-S, so 6(70-S)=5R , 420- 6S=5R ---(iv)
From (ii) 6S=5B, substituting in (iv), 420- 5B= 5R or B+R=84 ---(v)
So ages of Bernard and Uncle Roger after 5 years= (B+5) +(R+5)=B+R+10 =84+10 =94

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(8 years ago) "Other"

How many kg of rice priced at $ 3.6 should be added to 24 kg of rice priced at $ 2.7 per kg in order to make 5% profit on selling the maximum at $ 3.15 per kg?

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

(8 years ago) "Other"

a car travel 50% faster then bike both starts at the same time a to b . the car reach 25 minutes earlier then bike . if the distance between a to b is 100 km find speed.
A.120 B 100 c 80 d 75

Reply Like? Yes (2) | No

(8 years ago)

Speed(in kmph) of bike=80 , car=120

If speed of bike=x, then speed of a car=1.5x
According to given condition: (100/b) - (100/1.5b) =25/60
On solving, b=80, so speed of a car=1.5*80=120

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(8 years ago) "Other"

plzzzz send latest cocubes placement papers for capgemini at nillawargg@gmail.com

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(8 years ago) "Other"

plzzzz send latest cocubes placement papers for capgemini at nillawargg@gmail.com

Reply Like? Yes (1) | No

(8 years ago) "Interview"

TCS feb 2016 result got published. Finally i got selected feeling happy and great. All credits goes to M4maths. and thank u all for ur apps support. And also i received call letter very soooon thank godddd

Reply Like? Yes (7) | No

(8 years ago)

yes ...! i also got placed in TCS . which stream in u are..?

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(8 years ago) "Other"

Reply Like? Yes (3) | No

(8 years ago)

Karthika can u plz tell me how u have prepare for tcs.

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(8 years ago) "Other"

A circular road runs around a circular garden. If the sum of the circumferences of the inner and outer circles is 88 metres and the radius of the inner circle is one-third of the outer circle, then the width of the road is :

A. 4 metres
B. 5 metres
C. 6 metres
D. 7 metres

Reply Like? Yes (1) | No

(8 years ago)

D. 7 meters

If the radius of smaller circle=r then radius of bigger circle=3r
Given Sum of the circumferences=2*Pi*r + 2*Pi*3r=88, r=88/(8*Pi)=7/2, So 3r=21/2
Width of the road=Outer radius - Inner radius= (21/2) - (7/2)=7

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(8 years ago) "Other"

Permutation & Combination : How many ways can you order the letters from the word TREES if:
It begins with exactly one E?

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(8 years ago) "Other"

Ashok brought a gift article and spent Rs. 110 on its repair. He then sold it to Bhushan at a profit of 20%. Bhushan sold it to Charan at a loss of 10%, and Charan sold the same for Rs. 188 at a profit of 10%. How much did Ashok pay for the article?

Reply Like? Yes (1) | No

(8 years ago) "Other"

What is the length of a cylindrical wire of radius 3 mm that can be drawn from a copper sphere of radius 21 cm?

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(8 years ago) "Other"

A girl wants to buy a bag. She decided to save her pocket money to buy it. On the first day, she saves Rs. 10, and on every subsequent day, she saves Rs. 10 more than the money she has saved on the previous day. On which day would the girl be able to save Rs. 1200 for her bag?

Reply Like? Yes (1) | No

(8 years ago)

15 th day

Saving of a girl will be 10,20,30,40, ......... to sum up 1200 Rs.
As this forms an arithmetic series with first term a=10, difference d=10
Sum of an arithmetic series=(n/2)[2*a+(n-1)d]=1200 or (n/2)[2*10 + (n-1)*10]=1200
On simplifying , n^2+n-240=0 , (n-15)(n+16)=0, so n=15

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to (8 years ago) "Other"

hi,aradhana how r u..

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to (8 years ago) "Other"

can u plz send me the Tech Mahindra placement papers---- bhuvanatomail@gmail.com

Reply Like? Yes (1) | No

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