# Placement Questions & Answers :: TCS

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**TCS Practice Q&A**

321. A number when divided by D leaves a remainder of 8 and when divided by 3D leaves a remainder of 21. What is the remainder left, when twice the number is divided by 3D?

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

**Explanation:**

Let's number is N

so N = DX + 8 -------(1)

N = 3DY + 21 ---------(2)

From Eq. 1 & 2

=> D(X-3Y) = 13

"13" is prime number, and its factors will be 1 and 13 only

=> X-3Y must be 1

Let X = 4 and Y = 1, D=13

So, N = 60

Remainder Left = 2N / 3D

= 120 / 39 = 3

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**Tags:** TCS

322. The owner of a boutique decides to calculate the percentage of customers who purchase hats. If 40 percent of the store's customers decide to purchase items, and of those customers 15 percent purchase hats, what percent of the store's customers purchase hats?

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

**Explanation:**

Suppose there are 100 customers.

Given 40 persons want to purchase items.

15% purchase hats

=> 0.15*40

=> 6 persons want to purchase hats.

=> 6% want to purchase hats.

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**Tags:** TCS

323. The perimeter of a equilateral triangle and regular hexagon are equal. Find out the ratio of their areas?

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

**Explanation:**

Given, perimeter of a equilateral triangle and regular hexagon are equal

6r=3a

=> a/r = 2

So Ratio of their areas = (sqrt(3)/4)a^2 : 3sqrt(3)/2 r^2

=> a^2/r^2 : 3*2

=> 4:6 => 2:3

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324. A sealed envelope contains a card with a single digit written on it. Three of the following statements are true and one is false.

I. The digit is 1.

II. The digit is not 2.

III. The digit is not 9.

IV. The digit is 8.

Which one of the following must necessarily be correct?

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

**Explanation:**

Three of the given statements are true.

So both II and III are correct, and the given number is one of 1 or 8.

So option b is correct.

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325. There are 16 teams divided in 4 groups. Every team from each group will play with each other once. The top 2 teams will go to the next round and so on the top two teams will play the final match. Minimum how many matches will be played in that tournament?

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

**Explanation:**

Here is no explanation for this answer

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326. The shopkeeper charged 12 rupees for a bunch of chocolate. but i bargained to shopkeeper and got two extra ones, and that made them cost one rupee for dozen less then first asking price. How many chocolates I received in 12 rupees ?

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

**Explanation:**

n chocolates = Rs 12

Price per dozen = 144/n

I got n+2 in rs 12 = > Price per dozen = 144/n+2

144/n+2 = 144/n - 1

=> n = 16

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

**Answer:**** Option D **

**Explanation:**

Divisibility rule for 3 are like if sum of the digits divisible by 3.

Aum of the digits = 380

Remainder = 380/3 = 2.

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328. 4 men can check exam papers in 8 days working 5 hours regularly. What is the total hours when 2 men will check the double of the papers in 20 days?

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

**Explanation:**

Let a man can do 1 unit of work in 1 hour.

Total units of work = 4 * 8 * 5 = 160 units.

Now work = 2 * 160 = 320 units.

Now 2 men work for 20 days. Let in x hours they have to work per day.

Now total work = 2*x*20 = 40 x

40x = 320 So x = 320/40 = 8 hours.

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329. There are two bags containing white and black balls. In the first bag there are 8 white and 6 black balls and in the second bag, there are 4 white and 7 black balls. One ball is drawn at random from any of these two bags. Find the probability of this ball being black.

**Answer:**** Option D **

**Explanation:**

Here is no explanation for this answer

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330. In the below table, the sum of numbers in each column, each row and the two diagonals are the same.

What is the value of (A*B)+(c*d) - (E*F)?

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

**Explanation:**

Here is no explanation for this answer

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**Tags:** TCS

Here is the list of questions asked in TCS writing test questions TCS online test questions. 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