TCS mock test 1.TCS unsolved question of 2013. Solve and comment your answer to help others and me also.

1.The difference between the ages of two of my three grandchildren is 3. My eldest grandchild is three times older than the age of my youngest grandchild and my eldest grandchild's age is two years more than the ages of my two youngest grandchildren added together. How old is my eldest grandchild?
(a) 12
(b) 13
(c) 10
(d) 15

2.A greengrocer was selling apple at a penny each, chickoos at 2 for a penny and peanuts at 3 for a penny. A father spent 7 pennies and got the same amount of each type of fruit for each of his three children. What did each child get?
(a) 1 apple, 2 chickoos, 2 peanuts (c) 1 apple, 3 chickoos, 2 peanuts
(b) 1 apple, 2 chickoos, 1 peanut (d) 1 apple, 1 chickoo, 1 peanut

3.The IT giant Tirnop has recently crossed a head count of 150000 and earnings of $7 billion. As one of the forerunners in the technology front, Tirnop continues to lead the way in products and services in India. At Tirnop, all programmers are equal in every respect. They receive identical salaries and also write code at the same rate.Suppose 12 such programmers take 12 minutes to write 12 lines of code in total. How long will it take 72 programmers to write 72 lines of code in total?
(a) 12
(b) 18
(c) 6
(d) 72

4.One day Rapunzel meets Dwarf and Byte in the Forest of forgetfulness. She knows that Dwarf lies on Mondays, Tuesdays and Wednesdays, and tells the truth on the other days of the week. Byte, on the other hand, lies on Thursdays, Fridays and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Rapunzel - Dwarf: Yesterday was one of those days when I lie. Byte: Yesterday was one of those days when I lie too. What day is it?
(a) Monday
(b) Sunday
(c) Thursday
(d) Saturday

5.Alok and Bhanu play the following min-max game. Given the expression N = 9 + X + Y – Z , where X, Y and Z are variables representing single digits (0 to 9). Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be
(a) 20
(b) 18
(c) 27
(d) 0

Ans.  N=K+(X+Y-Z) ans = K+11

        N=K+(X-Y-Z) ans = K+2

        N=K+X*(Y-Z) ans = K+18

 no need to solve this.

6.A sheet of paper has statements numbered from 1 to 40. For each value of n from 1 to 40, statement n says "At least n of the statements on this sheet are true." Which statements are true and which are false?
a) All statements are false. b) The odd numbered statements are true the even numbered are false. c) All statements are true. d) The even numbered statements are true and the odd numbered are false.

7. 10 suspects are rounded by the police and questioned about a bank robbery. Only one of them is guilty. The suspects are made to stand in a line and each person declares that the person next to him on his right is guilty. The rightmost person is not questioned. Which of the following possibilities are true?
(A) All suspects are lying or the leftmost suspect is innocent. (B) All suspects are lying and the leftmost suspect is innocent. (c) Both A and B (d) Neither A nor B

8.The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
(a) 192
(b) 64
(c) 54
(d) 102

9.On planet zorba, a solar blast has melted the ice caps on its equator. 8 years after the ice melts, tiny plantoids called echina start growing on the rocks. echina grows in the form of a circle and the relationship between the diameter of this circle and the age of echina is given by the formula d = 4 * √ (t - 8) for t ≥ 8 where d represents the diameter in mm and t the number of years since the solar blast. Jagan recorded the radius of some echina at a particular spot as 8mm. How many years back did the solar blast occur?
(a) 8
(b) 12
(c) 16
(d) 24

10. A circular dartboard of radius 1 foot is at a distance of 20 feet from you. You throw a dart at it and it hits the dartboard at some point Q in the circle. What is the probability that Q is closer to the center of the circle than the periphery?
(a) ¼
(b) ½
(c)3/4
(d) 1/3

11.After the typist writes 12 letters and addresses 12 envelopes, she inserts the letters randomly into the envelopes (1 letter per envelope). What is the probability that exactly 1 letter is inserted in an improper envelope?
(a) 11/12
(b) 0
(c) 1/12
(d) 1/6

12.Alok is attending a workshop "How to do more with less" and today's theme is “Working with fewer digits”. The speakers discuss how a lot of miraculous mathematics can be achieved if mankind (as well as womankind) had only worked with fewer digits. The problem posed at the end of the workshop is “How many 5-digit numbers can be formed using the digits 1, 2, 3, 4, 5 (but with repetition) that are divisible by 4?” Can you help Alok find the answer?
(a) 375
(b) 625
(c) 500
(d) 3125

13.Given 3 lines in the plane such that the points of intersection form a triangle with sides of length 20, 20 and 30, the number of points equidistant from all the 3 lines is
(a) 1
(b) 0
(c) 4
(d) 2

14.The pacelength P is the distance between the rear of two consecutive footprints. For men, the formula, n/P = 144 gives an approximate relationship between n and P where, n = number of steps per minute and P = pacelength in meters. Bernard knows his pacelength is 164cm. The formula applies to Bernard’s walking. Calculate Bernard’s walking speed in kmph. (a) 236.16 (b) 11.39 (c) 8.78 (d) 23.24

15.Alice and Bob play the following coins-on-a-stack game. 20 coins are stacked one above the other. One of them is a special (gold) coin and the rest are ordinary coins. The goal is to bring the gold coin to the top by repeatedly moving the topmost coin to another position in the stack. Alice starts and the players take turns. A turn consists of moving the coin on the top to a position i below the top coin (0 ≤ i ≤ 20). We will call this an i-move (thus a 0-move implies doing nothing). The proviso is that an i-move cannot be repeated; for example once a player makes a 2-move, on subsequent turns neither player can make a 2-move. If the gold coin happens to be on top when it's a player's turn then the player wins the game. Initially, the gold coin is the third coin from the top. Then
(a) In order to win, Alice’s first move should be a 0-move. (b) In order to win, Alice’s first move should be a 1-move. (c) Alice has no winning strategy. (d) In order to win, Alice’s first move can be a 0-move or a 1-move

16.For the FIFA world cup, Paul, the octopus has been predicting the winner of each match with amazing success. It is rumored that in a match between 2 teams A and B, Paul picks A with the same probability as A's chances of winning. Let's assume such rumors to be true and that in a match between Ghana and Bolivia, Ghana the stronger team has a probability of 2/3 of winning the game. What is the probability that Paul will correctly pick the winner of the Ghana-Bolivia game?
(a) 5/9
(b) 1/9
(c) 2/3
(d) 1/3

17.36 people {a1, a2, ..., a36} meet and shake hands in a circular fashion. In other words, there are totally 36 handshakes involving the pairs, {a1, a2}, {a2, a3}, ..., {a35, a36}, {a36, a1}. Then size of the smallest set of people such that the rest have shaken hands with at least one person in the set is
(a) 18
(b) 13
(c) 34
(d) 12

18.One the Planet Oz, there are 8 days in a week – Sunday to Saturday and another day called Oz day. There are 36 hours in a day and each hour has 90 minutes while each minute has 60 seconds. As on earth, the hour hand covers the dial twice every day. Find the approximate angle between the hands of clock on Oz when the time is 12.40 am.
(a) 89
(b) 251
(c) 111
(d) 79

19.The IT giant Tirnop has recently crossed a head count of 150000 and earning of $7 billion. As one of the forerunners in the technology front, Tirnop continues to lead the way in products and services in India. At Tirnop, all programmers are equal in every respect. They receive identical salaries and also write code at the same rate. If 12 such programmers take 12 minutes to write 12 lines of code in total, how many lines of code can be written by 72 programmers in 72 minutes?
(a) 6
(b) 432
(c) 72
(d) 12

20.A hollow cube of size 5 cm is taken with a thickness of 1 cm. It is made of smaller cubes of size 1 cm. If the 4 faces of the outer surface of the cube are painted totally, how many faces of the smaller cubes remain unpainted?
(a) 900
(b) 488
(c) 500
(d)800

21.Planet fourfi resides in 4-dimensional space and thus the currency used by its residents are 3-dimensional objects. The notes are cubical in shape while their coins are spherical. However the coin minting machinery lays out some stipulations on the size of the coins. - The diameter of the coins should be at least 64mm and not exceed 512mm. - Given a coin, the diameter of the next larger coin is at least 50% greater. - The diameter of the coin must always be an integer. You are asked to design a set of coins of different diameters with these requirements and your goal is to design as many coins as possible. How many coins can you design?
(a) 5
(b) 8
(c) 9
(d) 6

22.A hare and a tortoise race along a circle of 100 yards diameter. The tortoise goes in one direction and the hare in the other. The hare starts after tortoise has covered 1/5 of its distance and that too leisurely. The hare and tortoise meet when the hare has covered only 1/8 of the distance. By what factor should the hare increase its speed so as to tie the race?
(a)8
(b) 37.80
(c) 40
(d) 5

23.Anoop managed to draw 7 circles of equal radii with their centres on the diagonal of a square such that the two extreme circles touch two sides of the square and each middle circle touches two circles on either side. Find the ratio of the radius of the circles to the side of the square.
(a) 1:(2 + 7Ö2)
(b) 1:(4 + 7Ö3)
(c) (2 + 7Ö2):1
(d) 1:(2 + 6Ö2)

24.Ferrari S.p.A. is an Italian sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari in 1928 as Scuderia Ferrari, the company sponsored drivers and manufactured race cars before moving into production of street-legal vehicles in1947 as Ferrari S.p.A. Throughout its history the company has been noted for its continued participation in racing especially in Formula One where it has enjoyed great success. Rohit once bought a Ferrari. It could go 2 times as fast as Mohit’s old Mercedes. If the speed of Mohit’s Mercedes is 32 km/hr and the distance travelled by the Ferrari is 952 km, find the total time taken in hours for Rohit to drive that distance.
(a) 15.88
(b) 29.75
(c) 14.88
(d)476

25.There are two boxes, one containing 10 red balls and the other containing 10 green balls. You are allowed to move the balls between the boxes so that when you choose a box at random and a ball at random from the chosen box, the probability of getting a red is maximized. This maximum probability is
(a) 37/38
(b) 1 / 2
(c) 14/19
(d) 3 / 4

26.Pizza shops make pizzas of same thickness but different diameter. Cost of pizza A with diameter 8 cm is 80 $, cost of the pizza B with diameter 12 cm is 240 $, cost of the pizza B with diameter 24 cm is 720 $. Which of the above mentioned pizzas gives the best value for money?
(a) A
(b) B
(c) C
(d) Cannot say

27.Determine the distance between x-intercept and z-intercept of the plane whose equation is 6x+8y-3z=72.
(a) 31.92
(b)26.83
(c) 32.66
(d) 25.63

28.Lucy finds around 25 groups of stars that appear to her as constellations. She draws 7 patterns of the constellations in her notebook and notes down the number of stars in each of them. She counts 5 stars in first constellation and 15 on next. She counts a number the third time and forgets to note it down. The next four constellations she counts 51, 53, 159, 161. Next day her father looks at the notebook and wants to know the number of stars in the third constellation. Lucy only remembers that number of stars counted in each of the constellation followed a pattern 5, 15, x, 51, 53, 159, 161. What is the value of x?
(a) 19
(b) 17
(c) 47
(d) 31

29.6 persons standing in the queue for ROBERT movie are wearing different coloured shirts. All of them belong to different age groups. After two years, their average age will be 43. A seventh person joined with them, hence the current average age has become 45. Find the age of seventh person?
(a) 67
(b) 69
(c) 72
(d) 74

30.X is 6 years younger to Y. X's father is a businessman who invested 10000 at 8% rate of interest and obtained his amount after 10 years. Y's father is a job holder who invested around 20000 at 2% rate and obtained his amount after 20 years. Now compounding, both of them get around Rs. A. After 5 years, the ratio of ages of X and Y is 1:2. Now X's father is 20 years older to Y and Y's father is 30 years more than X. After 20 years, again X's mother asks X's father to purchase a LCD TV which costs around 45000. What is the age of X and Y together?
(a) 12
(b) 8
(c) 18
(d) 6

31.The great musician Rahman has organized a live concert. The concert is organized in a big auditorium. Rahman plays both English and Tamil songs on his Yamaha Casio. The audience in the eastern part of the auditorium love listening to Tamil songs and those in the western part of the auditorium love listening to English songs. He plays songs in random. The probability that he plays English songs for 6 consecutive times is 1 in
(a) 32
(b) 16
(c) 64
(d) 128

32.It is dark in my bedroom and I want to get two socks of the same color from my drawer, which contains 24 red and 24 blue socks. How many socks do I have to take from the drawer to get at least two socks of the same colour?
(a) 3
(b) 25
(c) 48
(d) 26

33.A person was fined for exceeding the speed limit by 10mph. Another person was also fined for exceeding the same speed limit by twice the same. If the second person was traveling at a speed of 35 mph, find the speed limit
(a) 35 mph
(b) 15 mph
(c) 20 mph
(d) 30 mph

34.A person drives with constant speed and after some time he sees a milestone with 2 digits. Then travels for 1 hour and sees the same 2 digits in reverse order. 1 hour later he sees that the milestone has the same 2 digits with a 0 between them. What is the speed of the car?
(a) 54 (b) 45 (c) 27 (d) 36 35. With four fifths of the tank full, a vehicle travels 12 miles. How much distance will the vehicle travel with one-third tank full? (a) 8.05 km (b) 6.05 km (c) 12 km (d) 5 km