Reasoning: How to Solve Ranking from Top-Bottom - Overlapping Count, Non-Overlapping

Introduction

This topic typically carries 20-30 marks in competitive exams, and mastering it can make a huge difference in your overall score. So, let's dive in and learn how to solve ranking questions from top or bottom.

WHAT YOU NEED TO KNOW FIRST

Before we start, make sure you have these basic concepts on your fingertips:

1. Direction Chart: A simple chart that helps you keep track of the direction of movement (e.g., clockwise, anticlockwise).
2. BODMAS: A mnemonic to remember the order of operations (Brackets, Orders, Division, Multiplication, Addition, and Subtraction).
3. Sitting Arrangement Conventions: Familiarize yourself with common conventions like "facing north" or "facing east".

CRYSTAL‑CLEAR METHOD (Step‑by‑Step)

Here's a step-by-step guide to solving ranking questions from top or bottom:

1. Read the question carefully: Understand what's being asked and identify the key information.
2. Identify the direction: Determine the direction of movement (e.g., clockwise, anticlockwise).
3. Draw a direction chart: Create a simple chart to visualize the movement.
4. Mark the positions: Label the positions of the individuals or objects.
5. Apply the direction: Use the direction chart to apply the movement to the positions.
6. Count the overlapping or non-overlapping: Count the number of individuals or objects that overlap or do not overlap.

DEMO EXAMPLE

Suppose we have 5 people sitting in a circle and moving clockwise. If person A is at the top, who will be at the bottom after 3 movements?

1. Read the question carefully: We need to find the person at the bottom after 3 movements.
2. Identify the direction: The direction is clockwise.
3. Draw a direction chart: Create a simple chart with 5 positions.
4. Mark the positions: Label the positions A to E.
5. Apply the direction: Move 3 positions clockwise from A.
6. Count the overlapping or non-overlapping: Person E will be at the bottom.

WORKED EXAMPLES

Example 1 – Easy

Five friends – A, B, C, D, and E – are standing in a line. If they move 2 positions to the right, who will be at the top and bottom?

1. Read the question carefully: We need to find the person at the top and bottom after 2 movements.
2. Identify the direction: The direction is to the right.
3. Draw a direction chart: Create a simple chart with 5 positions.
4. Mark the positions: Label the positions A to E.
5. Apply the direction: Move 2 positions to the right from A to E.
6. Count the overlapping or non-overlapping: Person D will be at the top, and person E will be at the bottom.

What we learned: When moving to the right, the person at the top will be the one who was at the 4th position initially.

Example 2 – Medium

In a row of 7 people – A, B, C, D, E, F, and G – if they move 3 positions to the left, who will be at the top and bottom?

1. Read the question carefully: We need to find the person at the top and bottom after 3 movements.
2. Identify the direction: The direction is to the left.
3. Draw a direction chart: Create a simple chart with 7 positions.
4. Mark the positions: Label the positions A to G.
5. Apply the direction: Move 3 positions to the left from A to G.
6. Count the overlapping or non-overlapping: Person E will be at the top, and person C will be at the bottom.

What we learned: When moving to the left, the person at the top will be the one who was at the 5th position initially.

Example 3 – Exam‑Style

In a circle of 9 people – A, B, C, D, E, F, G, H, and I – if they move 4 positions clockwise, who will be at the top and bottom?

1. Read the question carefully: We need to find the person at the top and bottom after 4 movements.
2. Identify the direction: The direction is clockwise.
3. Draw a direction chart: Create a simple chart with 9 positions.
4. Mark the positions: Label the positions A to I.
5. Apply the direction: Move 4 positions clockwise from A to I.
6. Count the overlapping or non-overlapping: Person E will be at the top, and person C will be at the bottom.

What we learned: When moving clockwise, the person at the top will be the one who was at the 5th position initially.

Common Mistakes

MISTAKE 1 → WHY IT HAPPENS → CORRECT APPROACH

MISTAKE: Not reading the question carefully. WHY IT HAPPENS: Lack of attention to detail. CORRECT APPROACH: Read the question carefully and identify the key information.

MISTAKE 2 → WHY IT HAPPENS → CORRECT APPROACH

MISTAKE: Not identifying the direction. WHY IT HAPPENS: Misunderstanding the movement. CORRECT APPROACH: Identify the direction and apply it correctly.

MISTAKE 3 → WHY IT HAPPENS → CORRECT APPROACH

MISTAKE: Not drawing a direction chart. WHY IT HAPPENS: Lack of visualization. CORRECT APPROACH: Draw a direction chart to visualize the movement.

MISTAKE 4 → WHY IT HAPPENS → CORRECT APPROACH

MISTAKE: Not marking the positions. WHY IT HAPPENS: Lack of clarity. CORRECT APPROACH: Mark the positions clearly and label them.

MISTAKE 5 → WHY IT HAPPENS → CORRECT APPROACH

MISTAKE: Not counting the overlapping or non-overlapping. WHY IT HAPPENS: Lack of attention to detail. CORRECT APPROACH: Count the overlapping or non-overlapping carefully.

EXAM TRAPS

Trap 1 → How to Spot it → How to Avoid it

Trap: Ambiguous language. How to Spot it: Look for unclear or confusing language. How to Avoid it: Read the question carefully and ask for clarification if needed.

Trap 2 → How to Spot it → How to Avoid it

Trap: Misleading information. How to Spot it: Identify any irrelevant or misleading information. How to Avoid it: Focus on the key information and ignore the rest.

Trap 3 → How to Spot it → How to Avoid it

Trap: Overcomplicating the question. How to Spot it: Look for unnecessary complexity. How to Avoid it: Break down the question into simpler components and solve each part separately.

TIME‑SAVING SHORTCUTS

SHORTCUT 1: Elimination Trick

When solving ranking questions, eliminate the options that are clearly incorrect and focus on the remaining ones.

SHORTCUT 2: Diagram Hack

Use a diagram to visualize the movement and positions. This can help you identify the correct answer quickly.

SHORTCUT 3: Pattern Recognition

Look for patterns in the movement or positions. This can help you identify the correct answer quickly.

SHORTCUT 4: Simplification

Simplify the question by breaking it down into smaller components. This can help you solve the question more efficiently.

1‑MINUTE RECAP

Hey there, student! It's the night before the exam, and you're feeling confident. Remember, mastering ranking questions from top or bottom can make a huge difference in your score. Here's a quick recap of the strategy:

• Read the question carefully and identify the key information.
• Identify the direction and apply it correctly.
• Draw a direction chart to visualize the movement.
• Mark the positions clearly and label them.
• Count the overlapping or non-overlapping carefully.
• Eliminate the options that are clearly incorrect and focus on the remaining ones.
• Use a diagram to visualize the movement and positions.
• Look for patterns in the movement or positions.
• Simplify the question by breaking it down into smaller components.

You got this! Take a deep breath, stay focused, and crush that exam!