Logical 8 - Arrangements

Key Points to Remember:

Arrangements typically involve arranging people or objects in straight lines or around circles / squares or other geometrical shapes.

Practice Questions:

Set 1:

Study the following information to answer these questions.

1. Alex, Betsy, Chloe, Dennis, Edward, Fiona, Giles and Herbert are gamblers sitting around a round table facing the centre.
2. Dennis is the neighbour of Alex but not of Herbert.
3. Betsy is the neighbour of Fiona and 4th to the left of Dennis.
4. Edward is the neighbour of Herbert and 3rd to the right of Fiona.
5. Chloe is neither the neighbor of Alex nor of Giles.

Question 1:

Which of the following is wrong?

(a) Betsy is to the immediate left of Herbert.

(b) Herbert is to the immediate left of Edward.

(c) Dennis is 4th to the right of Fiona.

(d) All are correct.

Question 2:

Which of the following is correct?

(a) Dennis is to the immediate left of Giles.

(b) Alex is between Chloe and Dennis.

(c) Fiona is 3rd to the right of Dennis.

(d) Edward is between Herbert and Betsy.

Question 3:

Which of the following groups has the 2nd person sitting between the 1st and the 3rd?

(a) Alex-Fiona-Chloe

(b) Giles-Alex-Dennis

(c) Betsy-Edward-Herbert

(d) Herbert-Fiona-Betsy

Question 4:

Which of the following pairs has the 1st person sitting to the immediate right of the second?

(a) Betsy-Herbert 

(b) Fiona-Betsy

(c) Edwards-Giles 

(d) Alex-Dennis

Question 5:

Which of the following pairs are fourth to one another?

(a) Chloe-Edwards 

(b) Fiona-Herbert

(c) Dennis-Chloe

(d) Dennis-Betsy

Time to Think:

If Chloe and Giles interchange their positions, which of the following will indicate Alex’s

position?

(a) To the immediate right of Giles

(b) 4th to the right of Chloe

(c) 2nd to the left of Giles

(d) To the immediate left of Chloe

Solution:

From clues 1 to 3, we get, 

From 4, Edward is third to the right of Fiona. So, Case I turns out to be false. Now with clue 4, we have derived Case II - a and Case II - b.

From clue 2, we get that, Dennis is not the neighbor of Herbert. so, Case II - a gets rejected. From clue 2, the possibilities are, 

From clue 5, Chloe cant be the neighbor of Giles. So, Case II - c gets rejected, and also Chloe can't be the neighbor of Alex and the final arrangement is as follows.

Set 2:

In a row of soldiers facing North,

1. Lambert is 8th to the right of Khurusheva;
2. Mickey is 16^th from the left end;
3. Lambert is 16th to the right of Jackson, who is 27th from the right end of the row;
4. Khurusheva is nearer than Mickey to the right end of the row;
5. There are 5 boys between Mickey and Khurusheva.  

Question 1:

How many soldiers are there between Jackson and Mickey?

(a) One 

(b) Two

(c) Three 

(d) Data inadequate

Question 2:

How far away is Khurusheva from the right end of the row?

(a) 30th 

(b) 10th

(c) 19th 

(d) 18th

Question 3:

How many soldiers are there in the row?

(a) 50 

(b) 40

(c) 36 

(d) Data inadequate

Time to Think :

How far away is Jackson from the right end of the row?

(a) Data inadequate 

(b) 24th

(c) 25th 

(d) 27th

Solution: