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HackerRank Arrangements Quiz -1

Question 1

Time: 00:00:00

In a school reunion, eight friends meet after 20 years. All eight friends are having different professions as Doctor, Lawyer, Engineer, Manager, Teacher, Driver, Actor and Cricketer. They are sitting around a round table, facing towards the center, to have dinner.

Actor is third to the left of Engineer. Teacher and Doctor are neighbors. Manager is sitting opposite to the Cricketer. Lawyer is an immediate neighbor of Engineer. There are two people sitting between Actor and Cricketer. Teacher and Driver are sitting opposite to each other.

Who is sitting opposite to the Lawyer?

Actor

Driver

Manager

Teacher

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Question 2

Time: 00:00:00

Lawyer

Teacher

Manager

Cricketer

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Question 3

Time: 00:00:00

Cricketer

Doctor

Engineer

Manager

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Question 4

Time: 00:00:00

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Question 5

Time: 00:00:00

Driver - Engineer

Manager - Lawyer

Engineer - Doctor

Teacher - Actor

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Question 6

Time: 00:00:00

5040

5120

2880

2620

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Number of people = 8
Possible sitting arrangement around circular table = (8-1)! = 7! = 5040
So answer is (a)

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Question 7

Time: 00:00:00

Six students Rohit, Dhavan, Kholi, Samson, Jadeja and Hardik are standing in a straight line for a school assembly. They have been given instruction to stand as per height such that shorter one stands in front and Taller at the back.

Kholi has more people behind him than in front of him. Also there are exactly two people Kholi and Jadeja. Samson is the shortest among the six. Rohit and Dhavan stand next to each other. Also Hardik is shorter than Dhavan.

Who is the tallest among the six?

Dhavan

Jadeja

Rohit

Kholi

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Let the six students be R, D, K, S, J and H

Kholi has more people behind him than in front of him
So he occupies position 1, 2 or 3 from front
Case 1 ⇒ K _ _ _ _ _
Case 2 ⇒ _ K _ _ _ _
Case 3 ⇒ _ _ K _ _ _

Also there are exactly two people Kholi and Jadeja.
Case 1 ⇒ K _ _ J _ _
Case 2 ⇒ _ K _ _ J _
Case 3 ⇒ _ _ K _ _ J

Samson is the shortest among the six
So Case 1 is not possible
Case 2 ⇒ S K _ _ J _
Case 3 ⇒ S _ K _ _ J

Rohit and Dhavan stand next to each other

Case 2 ⇒ S K R D J H (or) S K D R J H
Case 3 ⇒ S H K R D J (or) S H K D R J

Hardik is shorter than Dhavan.
So case 2 is not possible

S H K R D J (or) S H K D R J
So tallest is Jadeja
So answer is (b)

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Question 8

Time: 00:00:00

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Question 9

Time: 00:00:00

Dhavan

Rohit

Hardik

Rohit or Dhavan

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Question 10

Time: 00:00:00

Six students Rohit, Dhavan, Kholi, Samson, Jadeja and Hardik are standing in a straight line for a school assembly. They have been given instruction to stand as per height such that shorter one stands in front and Taller at the back.

Kholi has more people behind him than in front of him. Also there are exactly two people Kholi and Jadeja. Samson is the shortest among the six. Rohit and Dhavan stand next to each other.

How many possible cases are possible from this given data?

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["0","40","60","80","100"]

["Need more practice!","Keep trying!","Not bad!","Good work!","Perfect!"]

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