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Question

Five friends, H, I, J, K and L, are top rank holders of a school. The rank of H is just above the rank of K and just below the rank of L. I is at the top rank and J is not at the lowest rank. Who among them is at the lowest rank?

The correct answer is

K

Solving the Ranking Puzzle: Finding the Lowest Rank

This question involves a logic puzzle where we need to determine the ranks of five friends, H, I, J, K, and L, based on the given clues and find who is at the lowest rank.

Let's analyze each clue carefully to build the ranking order.

Analysing the Ranking Clues

We have five friends: H, I, J, K, and L. They are top rank holders, meaning they likely occupy the top 5 ranks (e.g., 1st, 2nd, 3rd, 4th, 5th, where 1st is the highest rank).

  • Clue 1: The rank of H is just above the rank of K and just below the rank of L.
    • "Just above K" means H's rank is one better than K's rank.
    • "Just below L" means H's rank is one worse than L's rank.
    • This implies a consecutive sequence of ranks for L, H, and K, where L is ranked highest among these three, followed immediately by H, and then immediately by K.
    • We can represent this relative ranking as: L > H > K (in terms of rank, where > means 'ranked immediately higher than'). So, if L is rank $n$, H is rank $n+1$, and K is rank $n+2$.
  • Clue 2: I is at the top rank.
    • In a ranking of five, the top rank is the 1st rank.
    • So, I is the 1st ranked friend.
  • Clue 3: J is not at the lowest rank.
    • In a ranking of five, the lowest rank is the 5th rank.
    • So, J is not the 5th ranked friend.

Step-by-Step Deduction of Ranks

We have 5 ranks to fill: 1st, 2nd, 3rd, 4th, 5th.

  1. From Clue 2, we know I is 1st.
    • Ranks filled: 1st (I)
    • Ranks remaining: 2nd, 3rd, 4th, 5th
    • Friends remaining: H, J, K, L
  2. From Clue 1, we know L, H, and K must occupy three consecutive ranks in that specific order (L then H then K, in decreasing order of rank number, i.e., increasing order of rank position). For example, if L is 2nd, H must be 3rd, and K must be 4th.
  3. These three friends (L, H, K) must fit into the remaining ranks: 2nd, 3rd, 4th, 5th.
  4. Let's consider the possible ways to place the L-H-K sequence in three consecutive spots within ranks 2, 3, 4, 5:
    • Possibility A: L is 2nd, H is 3rd, K is 4th.
      • Ranks filled: 1st (I), 2nd (L), 3rd (H), 4th (K)
      • Rank remaining: 5th
      • Friend remaining: J
      • This would mean J is 5th. However, Clue 3 states that J is not at the lowest rank (5th). So, this possibility is incorrect.
    • Possibility B: L is 3rd, H is 4th, K is 5th.
      • Ranks filled: 1st (I), 3rd (L), 4th (H), 5th (K)
      • Rank remaining: 2nd
      • Friend remaining: J
      • This would mean J is 2nd. Does this satisfy Clue 3 (J is not 5th)? Yes, J being 2nd means J is not 5th.
  5. Possibility B is the only one that satisfies all clues. The ranking is:
    • 1st: I
    • 2nd: J
    • 3rd: L
    • 4th: H
    • 5th: K

Identifying the Lowest Rank

Based on our deduction, the ranks are as follows:

Rank Friend
1st I
2nd J
3rd L
4th H
5th K

The lowest rank is the 5th rank. The friend at the 5th rank is K.

Revision Table: Ranking Puzzle Summary

Friend Deduced Rank
I 1st (Top Rank)
J 2nd (Not lowest)
L 3rd (Just above H)
H 4th (Just below L, just above K)
K 5th (Lowest Rank)

Additional Information: Logic Puzzles and Ranking

Ranking puzzles are a common type of logical reasoning question. They require careful reading and step-by-step deduction to establish the order of items or people based on comparative clues.

  • Key Strategy: Break down complex information into smaller, manageable pieces.
  • Relative vs. Absolute Clues: Some clues give relative positions (e.g., A is above B), while others give absolute positions (e.g., C is 1st). Use absolute clues to anchor your deductions.
  • Combining Clues: Look for ways to combine relative clues to form longer sequences (like L-H-K in this puzzle).
  • Elimination: Use negative clues (like "J is not lowest") to eliminate possibilities.
  • Verification: Once you determine the final arrangement, quickly check if it satisfies all the original clues.

These puzzles enhance critical thinking and analytical skills, which are valuable in various problem-solving scenarios.

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Important Questions from Order Based

  1. Prakash, Qadir, Ramesh, Saurabh and Tariq are friends. Ramesh is taller than Qadir but shorter than Saurabh. Prakash is the shortest, and Tariq is taller than Saurabh. Who is the tallest among them?

  2. Pinky is taller than Priya but shorter than Reena. Riya is taller than Sheela, who is shorter than Priya. Reena is taller than Riya, who is taller than Pinky. Who is the shortest?

  3. Sonu is taller than Yatendra, Amit is taller than Sonu. Subhash is taller than Amit. Sattu is tallest of all. If they stand according to their height who will be exactly in the middle?

  4. R is taller than T. Both P and Q are taller than S, whose height is between P and T. If S is taller than T, who is the shortest?

  5. Seven chocolates A, B, C, D, E, F and G are bought at different costs between Rs. 40 and Rs. 50 (excluding 40 and 50) but not necessarily in the same order. The cost of chocolate C is five less than that of chocolate E. The cost of the chocolate A is a prime number. The cost of chocolate F is two more than that of chocolate A. The cost of chocolate F is more than that of chocolate E. The cost of chocolate D is an odd number. The cost of chocolate G is three more than the cost of chocolate D. None of the chocolates costs Rs. 44. The cost of chocolate B is an even number. Which is the following chocolates is costlier than E?

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