NIMCET 2017
There are five books A, B, C, D and E placed on a table. If A is placed below E, C is placed above D, B is placed below A and D is placed above E, then which of the following books touches the surface of the table?
Answer (Detailed Solution Below)View answer ▾Hide ▴
Answer: Option B — B
Detailed Solution
Combine the statements: B below A, A below E, E below D, D below C.
From the bottom: B, A, E, D, C. The bottom book B touches the table.
✓ Check
Each of the four statements holds in the order B, A, E, D, C.⚠ Common trap
(C) A is below E, but B is below A, so A is not at the bottom.Quick tip
Chain the 'below' facts: B, A, E, D, C from the bottom
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Ask a doubtMore Order & Ranking Questions
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Order & Ranking — Preparation
This question tests your understanding of Order & Ranking, a key topic in the Logical Reasoning section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
Order and ranking questions ask about a person's position in a row or class, or compare people by height, weight, age or marks. This topic covers ranks from the top and bottom (or left and right), the total number of people in a row, interchanging positions, and arranging people in order from a set of comparisons. The key formula is total = rank from top + rank from bottom - 1. When two people swap places, find the shift in one person's position to work out the total. For comparison questions, list the people from greatest to smallest as you read each clue, and use the symbols > and < to keep track. Watch for questions where the order cannot be fully determined. Practise the order and ranking questions below, each with a step-by-step solution.