# Placement Questions & Answers :: TCS

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411. The length, breadth and height of a room are in the ratio 3:2:1. If the breadth and height are halved, while the length is doubled. Then the total area of the 4 walls of the room will be decreased by

**Answer:**** Option A **

**Explanation:**

Given l:b:h=3:2:1

let h=10, b = 20, and l = 30 area = 2(l+b)h

area= 2*(3x+2x)*x = 2(30+20)10=1000

Now after those adjustments in the measurements, l=60, b=10, h=5

area= 2(l+b)h = 2(60+10)5=700

Percentage decrease= 1000?7001000 * 1000=30%

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412. Eesha bought 18 sharpeners for Rs.100. She paid 1 rupee more for each white sharpener than for each brown sharpener. What is the price of a white sharpener and how many white sharpener did she buy?

**Answer:**** Option B **

**Explanation:**

Here is no explanation for this answer

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413. Four people each roll a four die once. Find the probability that at least two people will roll the same number?

**Answer:**** Option B **

**Explanation:**

The number of ways of rolling a dice where no two numbers probability that no one rolls the same number = 6 * 5 * 4 * 3

Now total possibilities of rolling a dice = 64

The probability that a no one gets the same number = 6*5*4*364 = 518

So, the probability that at least two people gets same number = (1?518) = 1318

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414. The fourteen digits of a credit card are to be written in the boxes shown above. If the sum of every three consecutive digits is 18, then the value of x is:

**Answer:**** Option A **

**Explanation:**

Let us assume right most two squares are a , b

Then Sum of all the squares = 18 x 4 + a + b ------ (1)

Also Sum of the squares before 7 = 18

Sum of the squares between 7, x = 18 and

sum of the squares between x , 8 = 18

So Sum of the 14 squares = (18 + 7 + 18 + x + 18 + 8 + a + b) ------- (2)

By Solving equation 1 and 2

x = 3

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415. Given that 0 < a < b < c < d, which of the following the largest?

**Answer:**** Option A **

**Explanation:**

Take a = 1, b = 2, c = 3, d = 4

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416. Thomas takes 7 days to paint a house completely whereas Raj would require 9 days to paint the same house completely. How many days will take to paint the house if both them work together. (Give answers to the nearest integer)?

**Answer:**** Option A **

**Explanation:**

Here is no explanation for this answer

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417. In 2003, there are 28 days in February and there are 365 days in the year. In 2004, there are 29 days in February and there are 366 days in the year. If the date March 11, 2003 is Tuesday, then which on of the following would the date March 11, 2004 be?

**Answer:**** Option B **

**Explanation:**

March 11, 2003 is Tuesday. So March 11, 2004 weekday will be 2 days after Tuesday. i.e., Thursday.

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418. X = 101102103104105106107......146147148149150 (From numbers 101-150). Find out the remainder when this number is divided by 9.

**Answer:**** Option C **

**Explanation:**

The divisibility rule for 9 is sum of the digits is to be divisible by 9. So

We calculate separately, sum of the digits in hundreds place, tenths place, and units place.

Sum of the digits in hundreds place: 1 * 50 = 50

Sum of the digits in tenths place : 0 * 9 + 1 * 10 + 2 * 10 + 3 * 10 + 4 * 10 + 5 * 1 = 105

Sum of the digits in units place : (1 + 2 + 3 + ...+ 9) * 5 = 225

So total = 380

So remainder = 380 / 9 = 2

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419. A number is 101102103104...150. As 101 102 103 103.... 150. What is reminder when divided by 3?

**Answer:**** Option B **

**Explanation:**

Divisibility rule for 3 also same as 9.

so from the above discussion sum of the digits = 380

and remainder = 380/3 = 2

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420. 7^1+7^2+7^3+.......+7^205. Find out how many numbers present which unit place contain 3?

**Answer:**** Option B **

**Explanation:**

Units digits of first 4 terms are 7, 9, 3, 1. and this pattern repeats.

So for every 4 terms we get one term with 3 in its unit digit.

So there are total of 205/4 = 51 sets and each set contains one terms with 3 in its unit digit.

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Here is the list of questions asked in TCS Aptitude Test Question with Answers TCS Mock Test page 42. Practice TCS Written Test Papers with Solutions and take Q4Interview TCS Online Test Questions to crack TCS written round test. Overall the level of the TCS Online Assessment Test is moderate. Only those candidates who clear the written exam will qualify for the next round, so practic all the questions here and take all the free tests before going for final selection process of TCS