TCS Placement paper 2014 Set-4

TCS Latest placement questions with solution and explanation. These questions are for 2014 batch.

1. Hanuman can complete a bridge in 10 days and Ravanan can complete the same bridge in 20 days. Now they are working together and they are completing the bridge in 20 days. What is the contribution of Ravanan in constructing the bridge?

Ans. Destructing the bridge

Explanation: If they are both doing a positive work then they would have completed the work in less than 10 days, but still they are consuming 20 days together. This is possible only when  one of them is doing  a  negative  work.  If  Hanuman  is  doing  the  negative  work  then  the  bridge  won’t  get  completed.  So  the  only  other  person  to  do  the  negative  work  should  be  Ravanan.Thus Ravanan’s contribution in constructing the bridge is Destructing it.

2. 5 coffee and 4 tea costs Rs.96, 5 badam milk and 6 coffee costs Rs. 32 and 7 tea and 6 badam milk costs Rs.37. What is the combined price of 1tea, 1 coffee and 1 badam milk?

Ans. 15

Explanation: 5C+4T=96; 5B+6C=32; 7T+6B=37;
Therefore 5C+4T+5B+6C+7T+6B =96+32+37
i.e., 11C+11T+11B=165
then 1C+1T+1B=15.

3. Jake is faster than Paul. Jake and Paul each walk 40 km. The sum of their speeds is 13 km/h and the sum of time taken by them is 13 hours. Then Jake’s speed is equal to ?

Ans. 8 Kmph

Explanation: Given that speed of Jake is greater than Paul.
Distance = 40 km
Sum of their speed is 13 km/h = J+P
So possible speed ratio between J & P is
Go by Option
12:1, 11:2, 10:3, Not in option
8:5= (40/8)+(40/5) = 13 Hours
So Jake’s speed is 8km/h.

4. A Samsung duo and a Galaxy are bought for Rs.40000. The Duo is sold at a profit of 33.33% and the Galaxy is sold at a loss of 20%. There was no loss or gain. Find the cost price of the Samsung duo ?

Ans. Rs.15,000

Explanation: x+y= 40000
1.33x+ 0.8y= 40000
By solving these two equations:
The price of Samsung Duo, ie, x=15094 ~15000

5. If a Strawberry and a Butterscotch together cost Rs. 18.00, a Vanilla and a Strawberry cost Rs. 9.00 and a Butterscotch cost Rs.9.00 more than a Vanilla or a Strawberry then which of the following can be the price of a Butterscotch?

Ans. Rs. 13.5

Explanation: Butterscotch costs 9 more than a strawberry or Vanilla means Strwberry= Vanilla.
Since Vanilla +Strawberry=9
Vanilla= 4.5 and Strawberry = 4.5
Then we know that Butterscotch + Strawberry= 18
So Butterscotch= 18-4.5=13.5.

6. My next door neighbour lies a lot. In fact, he only tells the truth on one day a week! One day he  told  me,  “I  lie  on  Mondays  and  on  Tuesdays.”The  next  day  he  said,  “Today  is  either Thursday, Saturday or Sunday.”The next day he said, “I lie on Wednesdays and Fridays.” On which day of the week does my neighbour tell the truth?

Ans. Monday

Explanation:  The first statement is made on Thurs, he lies.
Second on Friday, Again he lies saying its Thurs, Sat or Sun.
On  sat  again  he  has  to  lie  ,  he  says  wed  and  Fri  he  lies,  on  fri  he  lies  is  true  ,  So  the  false
statement is that he lies on Wednesdays.

7. At the end of 1994 Rohit was 1/4 th as old as his grandmother. The sum of the years in which they were born is 3843. How old Rohit was at the end of 2001?

Ans. 36

Explanation: End of 1994 Rohit = Grandmother/4
R+G= 3843
1999 Rohit age = ?
[1994-(G/4)]+[1994-G] = 3843
5G/4 = 145
G = 29*4

8. Raj writes a number. He sees  that the number of two digits  is 9 less than 3 times the  number. If the number is increased by 45, the result is the same as the number formed by reversing the digit. Find the number.

Ans. 27

Explanation: Going by the options, 27 = 3(27) – 9
27+45=72(number reversed).

9. There are 5 sweets  –  Milk peda,  Ice  cream, Rasagulla  Paper sweet  and  Rasamalai  that I wish to  eat  on  5  consecutive  days  –  Monday  through  Friday,  one  sweet  a  day,  based  on  the  following self imposed constraints:

1)  Paper sweet is not eaten on Monday
2) If Milk peda is eaten on Monday, then Paper sweet must be eaten on Friday
3) If Paper sweet is eaten on Tuesday, Ice cream should be eaten on Monday
4)  Rasagulla should be eaten on the day preceding to the day of eating Milk peda.
Based on the above, Rasagulla can be eaten on any day except?

Ans. Friday

Explanation: Rasagulla should be eaten on the day preceding to the day on which uh eat milk peda. Friday is the last day and hence cannot be preceded by any other day.

10. Daniel can do some work in 12 hours, Roy can do the same work in 10 hours while Hillari can do  the same work in 15 hours. All the three of them start working at 9 a.m while Daniel stops works at 11 a.m and remaining two complete the work. Approximately at what time will the work be finished?

Ans. 2:00 PM

Explanation: Let the total work be 60 .
That means Daniel will do 5 parts , Hillary 4 parts and oy 6 parts.
Total work they do together in an hour is 15 parts. So from 9am to 11am in two hours they
complete 30 parts.
Next Daniel leaves Hillary+Roy do 4+6=10 parts/hour.
Hence next 30 parts will be completed in 3 hours.
Hence the work will be over by 2pm.

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