This page covers IBPS RRB PO Mirror & Water Images with complete concept notes, 15 graded practice MCQs, key points and exam-specific tips. Free to study.
Core ConceptRead this first — the foundation of the topic
CORE CONCEPT
Mirror Image: When you place a vertical mirror on the right side of an object, you get its mirror image. The image appears reversed horizontally
Water Image
When an object is reflected in water below it, you get its water image. The image appears flipped vertically
KEY RULES
Mirror Image Rules:
- Left becomes right, right becomes left
- Top and bottom positions remain same
- Curves change direction (C becomes reversed C)
- Numbers: 3 becomes reversed 3, 7 becomes reversed 7
Water Image Rules:
- Top becomes bottom, bottom becomes top
- Left and right positions remain same
- Curves flip vertically (smile becomes frown)
- Letters like M become W, p becomes d
Formula BlockMemorise — at least one formula appears in every paper
Exam PatternsWhat examiners ask — read before attempting PYQs
1
Find mirror image of letters/numbers/shapes
2
Find water image of clock faces
3
Combined mirror and water images
4
Which option matches the given transformation
ShortcutsUse these to save 30–60 seconds per question
#1 - CLOCK METHOD:
For clock mirror images:
- Mirror time = 12:00 - Given time
- If 3:15 is given, mirror = 12:00 - 3:15 = 8:45
- Remember to adjust minutes: 60 - given minutes
Worked ExampleSolve this step-by-step before moving on
1
Step 1
Write letters in reverse order: M-A-X-E
2
Step 2
Reverse each letter individually:
- E becomes reversed E
- X remains X (symmetrical)
- A becomes reversed A
- M becomes reversed M
3
Step 3
Final answer: Reversed M, Reversed A, X, Reversed E
WORKED EXAMPLE 2:
Question: Find water image of triangle with base at bottom
1
Step 1
Identify the orientation (base at bottom)
2
Step 2
Flip vertically - base moves to top
3
Step 3
All other features flip accordingly
4
Step 4
Answer: Triangle with base at top
SHORTCUT TRICK #2 - SYMMETRICAL LETTERS:
Symmetrical letters need no change:
- Horizontally symmetrical: A, H, I, M, O, T, U, V, W, X, Y
- Vertically symmetrical: B, C, D, H, I, O
- Use this to eliminate wrong options quickly
SHORTCUT TRICK #3 - DIRECTION ARROWS:
For arrows in mirror/water images:
- Mirror: Left arrow becomes right arrow
- Water: Up arrow becomes down arrow
- Combined: Diagonal arrows flip completely
Exam TrapsCommon mistakes students make — avoid these
#1:
Students confuse mirror and water images. Remember:
- Mirror = Side mirror of car (horizontal flip)
- Water = Lake reflection (vertical flip)
Many students apply wrong transformation and lose easy marks.
ADVANCED TIP:
For complex shapes, focus on one distinctive feature (like a small circle or line). Track how this feature moves in the transformation.
This saves time and reduces confusion.
PRACTICE STRATEGY:
Solve 10 questions daily. Start with simple letters, then move to numbers, shapes, and finally complex figures. Time yourself - aim for 30 seconds per question.
Key Points to Remember
Mirror image flips horizontally (left becomes right, right becomes left)
Water image flips vertically (top becomes bottom, bottom becomes top)
Clock mirror formula: 12:00 - Given time = Mirror time
Symmetrical letters remain unchanged in their respective transformations
Combined images require both horizontal and vertical flips
Direction arrows flip according to transformation type
Focus on distinctive features to track movement quickly
Letters like b become d in water image, p becomes q in mirror
Numbers 6 and 9 commonly interchange in water images
Practice identifying transformation type before attempting solution
Exam-Specific Tips
Mirror images show horizontal reversal with vertical positions unchanged
Water images show vertical reversal with horizontal positions unchanged
Clock showing 3:00 has mirror image showing 9:00
Letter 'R' becomes backwards 'R' in mirror image
Letter 'p' becomes 'q' in mirror and 'd' in water image
Number '2' becomes backwards '2' in mirror image
Triangle pointing up becomes triangle pointing down in water image
A clock showing 3:00 is placed in front of a mirror. What time will be shown in the mirror image?
Practice 2easy
A word 'MIRROR' is written on a paper. When the paper is held in front of a mirror, how will the word appear in the mirror image?
Practice 3easy
A word 'BOOK' is written on a paper. When the paper is placed in front of a mirror, which option correctly shows the mirror image?
Practice 4easy
The letter 'F' is written on a transparent sheet. When viewed from the back of the sheet (water image perspective), how will it appear?
Practice 5medium
A word is written on a piece of paper. When the paper is held up to a mirror, the mirror image appears as shown below:
Mirror Image: ⅃ƆIԀ
Which of the following is the original word written on the paper?
Practice 6medium
A figure shows a shape with a vertical dotted line in the middle. The left side contains: a triangle pointing up, a circle below it, and a square at the bottom. When this figure is reflected across the vertical dotted line (mirror line), what will appear on the right side?
Practice 7medium
A clock showing 3:00 is held in front of a mirror. What time will the mirror image show?
Practice 8medium
A figure contains a pattern with a horizontal dotted line through the middle. Above the line: a right-pointing arrow, a star, and a circle (left to right). Below the line: a left-pointing arrow, a square, and a triangle (left to right). When reflected across the horizontal dotted line (water reflection), which arrangement will be seen?
Practice 9medium
A word 'REASONING' is written on a paper. When this paper is held in front of a mirror, which of the following will be the mirror image of the word?
Practice 10hard
A clock showing 3:15 is placed in front of a mirror. What time does the mirror image show? (Assume the clock has no numbers, only hour and minute hands.)
Practice 11hard
A word is written on a transparent sheet. When the sheet is held up to a mirror, the mirror image reads 'MOBSTER'. What does the original word on the sheet read?
Practice 12hard
A transparent sheet has the following pattern: a right-pointing arrow, a left-pointing arrow below it, and a star below that. When viewed from the back of the sheet (as if looking through it from the opposite side), what pattern is seen?
Practice 13hard
A word is written on a transparent sheet. When the sheet is first placed in front of a mirror, the mirror image shows a horizontally flipped version. Then, the same sheet is placed in water such that the word is facing downward into the water. What will be the relationship between the water image and the original word?
Practice 14hard
A figure shows a shape with a vertical dotted line through its center. The left half contains: a triangle pointing right, a circle below it, and a square at the bottom. If this is a mirror image where the right half is the reflection, which of the following correctly describes what the right half should contain?
Practice 15hard
A figure consists of a horizontal line with a small square attached above it on the left side, and a small circle attached below it on the right side. A vertical mirror is placed along the horizontal line. What is the correct mirror image?
60-Second Revision — Mirror & Water Images
Remember: Mirror = horizontal flip, Water = vertical flip
Formula: Clock mirror time = 12:00 - given time
Trap: Don't confuse mirror and water transformations
Quick check: Identify symmetrical letters to save time
Focus: Track one distinctive feature for complex shapes
Speed tip: Eliminate options using symmetry rules
Common error: Applying wrong flip direction loses marks