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24 Jun 2025, 06:32
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Five people Pradeep, Qutub, Raj, Sandy and Tej are in a row. Raj sits to the immediate right of Tej. If Pradeep and Qutub have two persons sitting between them, which of the following must be true?
(A) Pradeep is at one end of the row.
(B) Qutub is sitting beside Pradeep.
(C) One among Tej and Raj is at one of the ends of the row.
(D) Sandy is at one of the ends of the row.
(A) Pradeep is at one end of the row.
(B) Qutub is sitting beside Pradeep.
(C) One among Tej and Raj is at one of the ends of the row.
(D) Sandy is at one of the ends of the row.
24 Jun 2025, 06:55
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Official Answer:
From constraint 1, we know that Raj sits to the immediate right of Tej, so we'll note it as TR.
From constraint 2, we know that there are 2 people between P and Q, so we'll denote it as P _ _ Q or Q _ _ P.
Case 1:
P sits at one end:
P _ _ Q _ , now here TR must be between P and Q and S at the right end, so P T R Q S is the arrangement.
Case 2:
P sits in the second position:
_ P _ _ Q , now again, TR should come in between them, so the arrangement is S P T R Q.
Now just swapping positions of P and Q in Case 1 and Case 2 would give us our 3rd and 4th cases.
Case 3:
Q T R P S
Case 4:
S Q T R P
A: Only true in Case 1 & Case 4, eliminate.
B: Not true in any case, eliminate.
C: Not true in any case, eliminate.
D: True in all cases, Right answer.
Correct Answer : D
From constraint 1, we know that Raj sits to the immediate right of Tej, so we'll note it as TR.
From constraint 2, we know that there are 2 people between P and Q, so we'll denote it as P _ _ Q or Q _ _ P.
Case 1:
P sits at one end:
P _ _ Q _ , now here TR must be between P and Q and S at the right end, so P T R Q S is the arrangement.
Case 2:
P sits in the second position:
_ P _ _ Q , now again, TR should come in between them, so the arrangement is S P T R Q.
Now just swapping positions of P and Q in Case 1 and Case 2 would give us our 3rd and 4th cases.
Case 3:
Q T R P S
Case 4:
S Q T R P
A: Only true in Case 1 & Case 4, eliminate.
B: Not true in any case, eliminate.
C: Not true in any case, eliminate.
D: True in all cases, Right answer.
Correct Answer : D
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