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Three-Letter String

Three-Letter String problems involve finding the water image of three-character letter strings. The water image requires reversing the order of all letters AND transforming each letter individually. These problems test your ability to apply water image rules to longer sequences.

10Worksheets
200+Practice Questions
AdvancedDifficulty
2-3 hoursHours to Master

What You'll Learn

Introduction & Overview Why This Matters How to Solve Pro Tips & Tricks
Shortcut Methods Common Mistakes Practice Worksheets Exam Importance

Introduction to Three-Letter String

Three-Letter String problems involve finding the water image of three-character letter strings. The water image requires reversing the order of all letters AND transforming each letter individually. These problems test your ability to apply water image rules to longer sequences.

Prerequisites

Single letter water images String reversal Two-letter combination water images
Why This Matters: Three-Letter String problems appear in 1-2 questions in advanced SSC CGL and Banking exams. They test sequential water image reasoning for longer strings.

How to Solve Three-Letter String Problems

1

Step 1: Write the given three-letter string

2

Step 2: Reverse the order of the letters (1st↔3rd, 2nd stays in middle)

3

Step 3: For each letter in the reversed string, find its water image

4

Step 4: Apply letter water image rules

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Step 5: Combine the transformed letters in order

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Step 6: This three-letter string is the water image

Pro Strategy: Reverse the entire string first, then transform each letter. For three letters, the first and third swap positions, while the middle letter stays in position but may transform.

Example Problem

Example: Find the water image of 'MOW'. Solution: Step 1: Given string: M O W Step 2: Reverse order: W O M Step 3: Water image of W = M Step 4: Water image of O = O Step 5: Water image of M = W Step 6: Combine: M O W Step 7: Water image of 'MOW' is 'MOW' Answer: MOW

Pro Tips & Tricks

  • Always reverse the order of letters first
  • The middle letter in a three-letter string stays in the middle position after reversal
  • Symmetrical letters (A,H,I,O,T,U,V,X,Y) remain same in water image
  • M and W swap places
  • The water image of 'MOM' is 'WOW' (reverse: MOM, then M→W, O→O, M→W → WOW)
  • The water image of 'WOW' is 'MOM'

Shortcut Methods to Solve Faster

Water image = reverse(string) with each letter transformed
For symmetrical letters only: water image = reverse(string)
For M/W: swap in reversed string
The middle character's position stays the same but may transform
Water image of palindrome = transform each letter (no order change needed)

Common Mistakes to Avoid

Forgetting to reverse the order
Only transforming letters without reversing
Not handling M↔W transformation correctly
Misplacing the middle letter after reversal

Exam Importance

Three-Letter String is an important topic for various competitive exams. Here's how frequently it appears:

SSC CGL
1-2 questions
BANKING PO
1-2 questions
RAILWAYS RRB
1-2 questions
INSURANCE
1-2 questions

Ready to Master Three-Letter String?

Start with Worksheet 1 and work your way up to expert level! Each worksheet includes:

20 practice questions
Detailed solutions
Step-by-step explanations
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