Coffee Room

Discuss anything here - everything that you wish to discuss with fellow engineers.

12915 Members

Join this group to post and comment.

# A Simple Question

**Some Questions from TCS**

Hi everyone

Can anyone answer the simple questions.These are the questions i found in last year TCS question papers.

1.A car is filled with four and half gallons of fuel for a round trip.

Fuel is taken 1/4 more in going then coming. What is the fuel

consumed in coming up?

2.Low temperature at the night in a city is 1/3 more than 1/2 high as

higher temperature in a day. Sum of the low tem. and highest temp.

is 100 degrees. Then what is the low temp?

3. A person, who decided to go to weekened trip should not

exceed 8 hours driving in a day. Average speed of forward journey

is 40 m/h. Due to traffic in sundays, the return journey average speed

is 30 m/h. How far he can select a picnic spot?

a) 120 miles

b) between 120 and 140 miles

c) 160 miles

plz do write the solutions to the above questions.

I couldn't understand this -

Let 'x' be the fuel consumed during return journey. Then (5x/4) becomes the quantity of fuel required during the forward journey.

Therefore, x + (5x/4) = 4.5

=> x = 2 is the quantity of fuel consumed while coming up.

Ans#3:

Let 'x' be the time (in hours) for forward journey & 'y' be the time (in hours) for the return journey.

=> x+y =8

If (a) were right, then total distance travelled = 120 x 2 = 240 miles.

that means 40x + 30y = 240

Solving for x & y results in x = 0 which is invalid.

Similarly try for (c). Which results into y = 0 hours.

Therefore the correct answer is option (b).

-Jerry.

p.s. post this question in Quantitative section.

a city is 1/3 more than 1/2 high asAns#1:

higher temperature

Let 'x' be the fuel consumed during return journey. Then (5x/4) becomes the quantity of fuel required during the forward journey.

Therefore, x + (5x/4) = 4.5

=> x = 2 is the quantity of fuel consumed while coming up.

Ans#3:

Let 'x' be the time (in hours) for forward journey & 'y' be the time (in hours) for the return journey.

=> x+y =8

If (a) were right, then total distance travelled = 120 x 2 = 240 miles.

that means 40x + 30y = 240

Solving for x & y results in x = 0 which is invalid.

Similarly try for (c). Which results into y = 0 hours.

Therefore the correct answer is option (b).

-Jerry.

p.s. post this question in Quantitative section.

**Answers**

well Jerry, even i got my answer as 2 gallons for the first but the answer to the first question is 20 gallons.

i couldn't understand second question and answer to the third one is 120miles.

but the answer to the first question is 20 gallons.How can it be 20 gallons? 😒

The car has only 4.5 gallons.

I couldn't get the answer to question 3. It has to be between 120 & 140 miles.

How did you get 120?

rick

yea u are rite rick the answer had to be 2gallons and the answer to third question should be (b) only.What about question 2 can anyone explain it??

**its sooooo simple**

2.Low temperature at the night in a city is 1/3 more than 1/2 high as

higher temperature in a day. Sum of the low tem. and highest temp.

is 100 degrees. Then what is the low temp?

Ans. wel d lower temp. is 40 n d higher's 60.

REASON : 40 is 1/3 more than 30 which is half of higher temp(60).

**my way**

I'll tell you how I did it. If you can do it that way, TCS won't be a problem 😀

1.A car is filled with four and half gallons of fuel for a round trip.Divide 4.5 into 2 & 2.5. Now 0.5 is 25% of 2 . That should give you the answer.

Fuel is taken 1/4 more in going then coming. What is the fuel

consumed in coming up?

2.Low temperature at the night in a city is 1/3 more than 1/2 high asSttepz did it the right way.

higher temperature in a day. Sum of the low tem. and highest temp.

is 100 degrees. Then what is the low temp?

3. A person, who decided to go to weekened trip should notIf I had only 20 seconds to solve this; I'd divide 8 into 4 + 4. 40x4 + 30x4 = 160+120 = 280. Which is twice of the higher limit in option (b). I can be 90% sure that answer is (b).

exceed 8 hours driving in a day. Average speed of forward journey

is 40 m/h. Due to traffic in sundays, the return journey average speed

is 30 m/h. How far he can select a picnic spot?

Well, there can be better ways. That was my approach of guessing the answer in shortest time. Accuracy rate is around 80%.

**-The Big K-**

**Thanx**

Thanx Everybody who took out the precious time for this thread.

**More!!**

1.a sales person multiplied a number and get the answer is 3

instead of that number divided by 3.what is the answer he actually

has to get.

2.a ship started from a port and moving with I mph and another ship

started from L and moving with H mph.at which place these two ships

meet.

3.a building with height D ft shadow upto G.A neighbour building

with what height shadow C ft is

**simple**

1.a sales person multiplied a number and get the answer is 3😒 Please rewrite the question or give me the options.

instead of that number divided by 3.what is the answer he actually

has to get.

2.a ship started from a port and moving with I mph and another shipAssumption: The ships are moving towards each other 😀

started from L and moving with H mph.at which place these two ships

meet.

Let' the ships meet after 't' hours. So,

t = { L / (I+H) } hrs.

Therefore, the ships meet at I x t miles from the port. Easy!

3.a building with height D ft shadow upto G.A neighbour buildingThe ratio is D:G . Assuming similar triangles (draw the figure yourself), the height with shadow C ft. should be DxC / G .

with what height shadow C ft is

**Crook**

good work crook. Neha please confirm the answers.

Jerrygood work crook. Neha please confirm the answers.

still waiting for confirmation of answers......

😁

--Crazy

**some more....**

These are some of the questions i found in IBM papers...Answers have been marked...Try them Out!!!

1.From height of 8 mts on ball fell down and each time it bounces half the

distnace back. so what will be the distance travelled ??

a.24---->Ans

b.26

c.28

d.none of above answers

2.If a person sells a product for rs141/- he suffers a loss of 6%.if he has to have a profit of 10%, at what price should he sell it?

a.200rs

b.175rs

c.210rs

d.165rs---->Ans

3.which of the following is the sum of 3 consecutive prime nos?

a.49

b.59

c.both a and b---->Ans

d.100

4.If 3 houses are to be painted,mr A can paint a house in 6 days mr B can do the same in 8 days...& mr.C in 12 days.if mr A does the work for 8 days & leaves for vacation, & mr B continues the work for the next 6 days, for how many days should mr.C work?

a.11 days

b.13 days

c.17 days---->Ans

d.None of the Given answers

5.4 thieves rob a bakery of the breadone after the other.each thief takes half of what is present ,& half a bread...if at the end 3 bread remains,what is the no of bread that

was present initiallly?

a.63

b.65

c.67

d.None of the given answers---->Ans

can anybody give the solutions to 1st,3rd and 4th??

I got the answer to the 5th one as 80.

I got the answer to the 5th one as 80.

**solved**

Hi Neha,

Here we go -

1.From height of 8 mts on ball fell down and each time it bounces half theWell, the series which comes to my mind is -

distnace back. so what will be the distance travelled ??

8 (initial) + 2 x 4 + 2 x 2 + 2 x 1 + ...... (infinite)

Which equals : 8 + 2 ( 4+2+1+..... )

= 8 + 2 [ 4 / ( 1-0.5 ) ] (Infinite Series Sum)

= 8 + 2 [ 4 x 2 ]

= 24

Option 'a'

3.which of the following is the sum of 3 consecutive prime nos?49 = 13+17+19

a.49

b.59

c.both a and b---->Ans

d.100

59 = 17+19+23

Option 'c'

If 3 houses are to be painted,mr A can paint a house in 6 days mr B can do the same in 8 days...& mr.C in 12 days.if mr A does the work for 8 days & leaves for vacation, & mr B continues the work for the next 6 days, for how many days should mr.C work?To complete the work,

A must work for 18 Days

B for 24 Days

C for 36 Days

Suppose that total work is of 72 units, then -

A does 4 units/day

B does 3 units/day

C does 2 unites/day

Now, for the first 8 days, A does 8 x 4 = 32 units

and for next 6 days, B does 6 x 3 = 18 units.

Therefore, total work completed by A & B is 32+18 = 50 units.

Remaining work, which is 72-50 = 22 units has to be completed by C. So with 2 units per day, he will complete the work in 22/2 = 11 Days.

Option 'a'.

Please verify.

**-The Big K-**

Thanx!!...well how did u take the total work to be 72units in 4th question??

**Guess?**

18, 24 & 36

and ...

72 😀

umm... Guess? 😉

**-The Big K-**

80? How?nehacan anybody give the solutions to 1st,3rd and 4th??

I got the answer to the 5th one as 80.

hey that was a great job, GOOD ADMIN

i got the answer to 5th one as 89

solution:

let the breads initially present to be x.

then,

(x/2+1/2) + [1/2(x/2+1/2)]+1/2 + [1/2{1/2(x/2+1/2)+1/2}]+1/2 +

1/2[1/2{1/2{x/2+1/2)+1/2}+1/2] + 3 = x

Solving the equation,

x = 89.

wat is the sum of infinite series???

solution:

let the breads initially present to be x.

then,

(x/2+1/2) + [1/2(x/2+1/2)]+1/2 + [1/2{1/2(x/2+1/2)+1/2}]+1/2 +

1/2[1/2{1/2{x/2+1/2)+1/2}+1/2] + 3 = x

Solving the equation,

x = 89.

wat is the sum of infinite series???

The Sum of an Infinite Geometric Series If -1 <

*r*< 1 (or ), then the sum of the infinite geometric series**in which is the first term and**

*r*is the common ratio is given by

.

-The Big K-

.

-The Big K-

the 5 th one is 64..let there be X bread..the 1st one takes 1/2 bread and X/2 bread...so REMAINING bread is (X - 1/2 - X/2) =( X/2 - 1/2)

2nd one ....................remaining bread - 1/2(remaining bread)-1/2 (X/2 - 1/2) - 1/2 - (X/4 - 1/4) =(X/4 - 3/4)

3rd one ............................................................................... (X/4 - 3/4) - 1/2 - (X/8 - 3/8) =(X/8 - 7/8)

4th one ................................................................................ (X/8 - 7/8) -1/2 - (X/16 - 7/16) =(X/16 - 15/16)

SEE there is a sequence if there is N number of thief AND that is

So if you solve the 4th EQUATION (X/16 - 15 /16) = 3 ....You will see 64 is the ans..which is very close to the options..bt none of them................

2nd one ....................remaining bread - 1/2(remaining bread)-1/2 (X/2 - 1/2) - 1/2 - (X/4 - 1/4) =(X/4 - 3/4)

3rd one ............................................................................... (X/4 - 3/4) - 1/2 - (X/8 - 3/8) =(X/8 - 7/8)

4th one ................................................................................ (X/8 - 7/8) -1/2 - (X/16 - 7/16) =(X/16 - 15/16)

SEE there is a sequence if there is N number of thief AND that is

*...............***( X / 2^N ) - ( (2^ N) -1) / ( 2^N)**So if you solve the 4th EQUATION (X/16 - 15 /16) = 3 ....You will see 64 is the ans..which is very close to the options..bt none of them................