Rule Detection - Intermediate Level: visual regulations INTERMEDIATE

Quick mental agility โ˜… session: 20 intermediate-level rule detection questions. Worksheet 17 of 30 - Focus: visual regulations. Practice design principles, figure rules, pattern constraints with instant feedback. Great for mid-level students needing moderate complexity with mixed patterns practice.

๐Ÿ“ Worksheet 17 of 30 โ€ข 20 questions โ€ข โฑ๏ธ Estimated time: 20 minutes โ€ข ๐ŸŽฏ Intermediate level

What you'll learn in this worksheet:
Your progress through Rule Detection
Worksheet 17 of 30 (56% complete)

Question 1

Identify the scaling rule in this sequence: Figure 1: Figure 2: Figure 3: Figure 4: Select the next figure:
PATTERN ANALYSIS:
Step 1: Measure the radius of circles in each figure
- Figure 1: radius = 80 units
- Figure 2: radius = 40 units
- Figure 3: radius = 20 units
- Figure 4: radius = 10 units

Step 2: Calculate size changes between consecutive figures
- Fig 1 โ†’ 2: 40 รท 80 = 0ร—
- Fig 2 โ†’ 3: 20 รท 40 = 0ร—
- Fig 3 โ†’ 4: 10 รท 20 = 0ร—

RULE HYPOTHESIS:
The circle radius halves each time (geometric progression)

VERIFICATION:
All consecutive ratios are consistent: 0ร— โœ“

APPLICATION:
Figure 5 radius = 10 ร— 0 = 5 units

SCALING PATTERN TYPES:
- Geometric progression: constant r = 0

COMMON MISTAKES TO AVOID:
- Confusing diameter with radius
- Assuming linear when pattern is geometric (or vice versa)
- Miscounting the number of steps
- Not checking both differences AND ratios to identify pattern type

Question 2

Identify ALL transformation rules (multiple transformations occurring simultaneously): Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
MULTI-DIMENSIONAL PATTERN ANALYSIS:

Transformation 1 - Rotation Analysis:
Step 1: Measure rotation angles
- Figure 1: 0ยฐ
- Figure 2: 45ยฐ
- Figure 3: 90ยฐ
- Figure 4: 135ยฐ

Rotation increment: +45ยฐ per step โœ“

Transformation 2 - Size Analysis:
Step 2: Measure square dimensions
- Figure 1: 15 units
- Figure 2: 18 units
- Figure 3: 21 units
- Figure 4: 24 units

Size increment: +3 units per step โœ“

COMBINED RULE HYPOTHESIS:
TWO simultaneous transformations:
1. Rotation: +45ยฐ clockwise per step
2. Scaling: +3 units per step

VERIFICATION:
Both patterns verified independently โœ“
Check for correlation: None (independent transformations) โœ“

APPLICATION:
Figure 5 predictions:
- Rotation: 135ยฐ + 45ยฐ = 180ยฐ
- Size: 24 + 3 = 27 units

ADVANCED MULTI-RULE DETECTION:
- Decompose complex transformations
- Analyze each dimension independently
- Verify pattern consistency for each rule
- Check for rule interactions or dependencies
- Combine predictions from all rules

COMMON MISTAKES TO AVOID:
- Focusing on only one transformation
- Missing the scaling while tracking rotation
- Not verifying both patterns independently
- Assuming transformations must be related
- Incomplete pattern analysis

Question 3

Identify the geometric transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: What shape comes next?
PATTERN ANALYSIS:
Step 1: Identify each shape by counting sides
- Figure 1: 5 sides (pentagon)
- Figure 2: 4 sides (quadrilateral)
- Figure 3: 3 sides (triangle)
- Figure 4: 2 sides (2-gon)

Step 2: Analyze side count progression
- Fig 2 - Fig 1 = -1 sides
- Fig 3 - Fig 2 = -1 sides
- Fig 4 - Fig 3 = -1 sides

RULE HYPOTHESIS:
Each polygon loses one side in sequential transformation

VERIFICATION:
Consistent transformation: -1 side per step โœ“

APPLICATION:
Figure 5: 2 - 1 = 1 sides
Shape: 1-gon

GEOMETRIC PRINCIPLES:
- Regular polygons maintain equal side lengths
- Interior angle changes with side count
- Formula: Interior angle = (n-2) ร— 180ยฐ / n

COMMON MISTAKES TO AVOID:
- Miscounting sides in complex polygons
- Confusing vertices with sides
- Not recognizing regular vs irregular polygons
- Missing the consistent arithmetic progression

Question 4

Detect the shading/fill pattern rule: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Examine the fill/shading in each figure
Step 2: Look for systematic changes in shading

RULE HYPOTHESIS:
The shading pattern adds one more filled segment each time

VERIFICATION:
Check pattern consistency across all four figures โœ“

APPLICATION:
Based on the identified rule, the next figure should continue the pattern

SHADING ANALYSIS TECHNIQUES:
- Check for binary patterns (filled/unfilled)
- Look for cyclic color patterns
- Count filled vs unfilled elements
- Observe progressive filling patterns
- Check for symmetry in shading

COMMON MISTAKES TO AVOID:
- Missing subtle shading differences
- Not recognizing cyclic patterns
- Assuming random shading changes
- Overlooking progressive patterns

Question 5

Detect the rule governing the number of elements: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Count elements in each figure
- Figure 1: 2 triangles
- Figure 2: 3 triangles
- Figure 3: 4 triangles
- Figure 4: 5 triangles

Step 2: Calculate differences between consecutive figures
- Fig 2 - Fig 1 = 1
- Fig 3 - Fig 2 = 1
- Fig 4 - Fig 3 = 1

RULE HYPOTHESIS:
The number of triangles is increasing by 1 in each step

VERIFICATION:
All consecutive differences are consistent: +1 โœ“

APPLICATION:
Figure 5 should have 5 +1 = 6 triangles

COMMON MISTAKES TO AVOID:
- Miscounting elements in figures
- Not checking all consecutive differences
- Assuming non-linear progressions too early

Question 6

Identify the conditional transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: If the next shape is a closed triangle, what marking should it have?
CONDITIONAL RULE ANALYSIS:

Step 1: Classify each figure
- Figure 1: Closed shape (circle) โ†’ has DOT inside
- Figure 2: Open shape (arc) โ†’ has LINE segment
- Figure 3: Closed shape (square) โ†’ has DOT inside
- Figure 4: Open shape (curve) โ†’ has LINE segment

Step 2: Identify the conditional pattern
Check correlation between shape type and marking:
- ALL closed shapes โ†’ contain dots โœ“
- ALL open shapes โ†’ contain lines โœ“

CONDITIONAL RULE HYPOTHESIS:
IF shape is CLOSED โ†’ THEN add dot inside
IF shape is OPEN โ†’ THEN add line segment

VERIFICATION:
Test hypothesis against all figures:
- Figure 1: Closed + Dot โœ“
- Figure 2: Open + Line โœ“
- Figure 3: Closed + Dot โœ“
- Figure 4: Open + Line โœ“

Rule verified across all cases โœ“

APPLICATION:
Given: Next shape is a CLOSED triangle
Apply rule: IF closed โ†’ THEN add dot
Result: Triangle with dot inside

BOOLEAN LOGIC FRAMEWORK:
- Condition: IsClosed(shape)
- True branch: AddDot()
- False branch: AddLine()

CONDITIONAL RULE DETECTION STRATEGY:
1. Identify potential condition variables
2. Classify all examples by condition
3. Check for consistent outcomes per condition
4. Formulate IF-THEN rule
5. Verify rule on all examples
6. Apply to new case based on its condition

COMMON MISTAKES TO AVOID:
- Not recognizing the conditional nature
- Treating as simple alternating pattern
- Ignoring the shape property (open/closed)
- Applying wrong transformation for given condition
- Missing the IF-THEN logical structure

Question 7

Detect the shading/fill pattern rule: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Examine the fill/shading in each figure
Step 2: Look for systematic changes in shading

RULE HYPOTHESIS:
The shading pattern cycles through black โ†’ gray โ†’ white

VERIFICATION:
Check pattern consistency across all four figures โœ“

APPLICATION:
Based on the identified rule, the next figure should continue the pattern

SHADING ANALYSIS TECHNIQUES:
- Check for binary patterns (filled/unfilled)
- Look for cyclic color patterns
- Count filled vs unfilled elements
- Observe progressive filling patterns
- Check for symmetry in shading

COMMON MISTAKES TO AVOID:
- Missing subtle shading differences
- Not recognizing cyclic patterns
- Assuming random shading changes
- Overlooking progressive patterns

Question 8

Identify the set operation rule being applied: Figure 1 (Set A): Figure 2 (Set B): Figure 3 (Operation): โˆฉ What is the result (Figure 4)?
SET THEORY PATTERN ANALYSIS:

Step 1: Identify the sets
- Set A (Figure 1): Elements at specific positions
- Set B (Figure 2): Elements at specific positions

Step 2: Identify overlapping elements
- Compare positions in both sets
- Element at (50, 60) appears in BOTH sets

Step 3: Recognize the operation
- Operation symbol: โˆฉ
- Operation type: Intersection (A โˆฉ B)

RULE HYPOTHESIS:
The rule is a Intersection (A โˆฉ B) operation

SET OPERATION DEFINITION:
Intersection (A โˆฉ B) contains only elements common to both sets

APPLICATION:
Set A has elements: {(40, 60), (50, 60)}
Set B has elements: {(50, 60), (70, 60)}

Intersection (A โˆฉ B) result:
- Common elements: {(50, 60)}
- A-only elements: {(40, 60)}
- B-only elements: {(70, 60)}

Result depends on operation:
- Union: All unique = {(40, 60), (50, 60), (70, 60)}
- Intersection: Common only = {(50, 60)}
- Difference: A-only = {(40, 60)}

SET THEORY PRINCIPLES:
- Union: A โˆช B = {x | x โˆˆ A OR x โˆˆ B}
- Intersection: A โˆฉ B = {x | x โˆˆ A AND x โˆˆ B}
- Difference: A โˆ’ B = {x | x โˆˆ A AND x โˆ‰ B}

COMMON MISTAKES TO AVOID:
- Confusing union with intersection
- Forgetting to remove duplicates in union
- Wrong order in difference operation (Aโˆ’B โ‰  Bโˆ’A)
- Miscounting common elements

Question 9

Identify the rule and select the next figure in the sequence: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Compare consecutive figures - observe the orientation changes
Step 2: Measure rotation angle between Figure 1 and Figure 2 = 90ยฐ
Step 3: Verify this pattern: Figure 2โ†’3 also shows 90ยฐ rotation
Step 4: Verify Figure 3โ†’4 also follows the same 90ยฐ rotation

RULE HYPOTHESIS:
The figure rotates clockwise by 90ยฐ in each step

VERIFICATION:
- Figure 1 to 2: 90ยฐ clockwise โœ“
- Figure 2 to 3: 90ยฐ clockwise โœ“
- Figure 3 to 4: 90ยฐ clockwise โœ“

APPLICATION:
Figure 5 should be Figure 4 rotated clockwise by 90ยฐ
Total rotation from start = 360ยฐ

COMMON MISTAKES TO AVOID:
- Confusing clockwise with counterclockwise rotation
- Measuring rotation incorrectly
- Assuming different rotation angles

Question 10

Identify the set operation rule being applied: Figure 1 (Set A): Figure 2 (Set B): Figure 3 (Operation): โˆ’ What is the result (Figure 4)?
SET THEORY PATTERN ANALYSIS:

Step 1: Identify the sets
- Set A (Figure 1): Elements at specific positions
- Set B (Figure 2): Elements at specific positions

Step 2: Identify overlapping elements
- Compare positions in both sets
- Element at (50, 60) appears in BOTH sets

Step 3: Recognize the operation
- Operation symbol: โˆ’
- Operation type: Difference (A โˆ’ B)

RULE HYPOTHESIS:
The rule is a Difference (A โˆ’ B) operation

SET OPERATION DEFINITION:
Difference (A โˆ’ B) contains elements in A that are not in B

APPLICATION:
Set A has elements: {(40, 60), (50, 60)}
Set B has elements: {(50, 60), (70, 60)}

Difference (A โˆ’ B) result:
- Common elements: {(50, 60)}
- A-only elements: {(40, 60)}
- B-only elements: {(70, 60)}

Result depends on operation:
- Union: All unique = {(40, 60), (50, 60), (70, 60)}
- Intersection: Common only = {(50, 60)}
- Difference: A-only = {(40, 60)}

SET THEORY PRINCIPLES:
- Union: A โˆช B = {x | x โˆˆ A OR x โˆˆ B}
- Intersection: A โˆฉ B = {x | x โˆˆ A AND x โˆˆ B}
- Difference: A โˆ’ B = {x | x โˆˆ A AND x โˆ‰ B}

COMMON MISTAKES TO AVOID:
- Confusing union with intersection
- Forgetting to remove duplicates in union
- Wrong order in difference operation (Aโˆ’B โ‰  Bโˆ’A)
- Miscounting common elements

Question 11

Detect the shading/fill pattern rule: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Examine the fill/shading in each figure
Step 2: Look for systematic changes in shading

RULE HYPOTHESIS:
The shading pattern alternates between filled and unfilled

VERIFICATION:
Check pattern consistency across all four figures โœ“

APPLICATION:
Based on the identified rule, the next figure should continue the pattern

SHADING ANALYSIS TECHNIQUES:
- Check for binary patterns (filled/unfilled)
- Look for cyclic color patterns
- Count filled vs unfilled elements
- Observe progressive filling patterns
- Check for symmetry in shading

COMMON MISTAKES TO AVOID:
- Missing subtle shading differences
- Not recognizing cyclic patterns
- Assuming random shading changes
- Overlooking progressive patterns

Question 12

Identify the complex positional movement rule: Figure 1: Figure 2: Figure 3: Figure 4: Where should the dot appear next?
PATTERN ANALYSIS:
Step 1: Track the position of the dot in each figure
- Figure 1: Position at (40, 60)
- Figure 2: Position at (60, 40)
- Figure 3: Position at (80, 60)
- Figure 4: Position at (60, 80)

Step 2: Analyze movement vectors
- Fig 1โ†’2: ฮ”x = 20, ฮ”y = -20
- Fig 2โ†’3: ฮ”x = 20, ฮ”y = 20
- Fig 3โ†’4: ฮ”x = -20, ฮ”y = 20

Step 3: Detect movement pattern
The dot follows a spiral inward pattern

RULE HYPOTHESIS:
Systematic positional movement following spiral inward pattern

VERIFICATION:
All movements conform to the identified pattern โœ“

APPLICATION:
Next position: (50, 60)
Following the established spiral inward pattern

ADVANCED TECHNIQUES:
- Plot positions on coordinate system
- Check for symmetry and periodicity
- Analyze velocity and acceleration vectors
- Consider boundary conditions

COMMON MISTAKES TO AVOID:
- Assuming simple linear movement
- Not considering boundary reflections
- Missing rotational or circular patterns
- Ignoring spatial constraints

Question 13

Identify the conditional transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: If the next shape is a closed triangle, what marking should it have?
CONDITIONAL RULE ANALYSIS:

Step 1: Classify each figure
- Figure 1: Closed shape (circle) โ†’ has DOT inside
- Figure 2: Open shape (arc) โ†’ has LINE segment
- Figure 3: Closed shape (square) โ†’ has DOT inside
- Figure 4: Open shape (curve) โ†’ has LINE segment

Step 2: Identify the conditional pattern
Check correlation between shape type and marking:
- ALL closed shapes โ†’ contain dots โœ“
- ALL open shapes โ†’ contain lines โœ“

CONDITIONAL RULE HYPOTHESIS:
IF shape is CLOSED โ†’ THEN add dot inside
IF shape is OPEN โ†’ THEN add line segment

VERIFICATION:
Test hypothesis against all figures:
- Figure 1: Closed + Dot โœ“
- Figure 2: Open + Line โœ“
- Figure 3: Closed + Dot โœ“
- Figure 4: Open + Line โœ“

Rule verified across all cases โœ“

APPLICATION:
Given: Next shape is a CLOSED triangle
Apply rule: IF closed โ†’ THEN add dot
Result: Triangle with dot inside

BOOLEAN LOGIC FRAMEWORK:
- Condition: IsClosed(shape)
- True branch: AddDot()
- False branch: AddLine()

CONDITIONAL RULE DETECTION STRATEGY:
1. Identify potential condition variables
2. Classify all examples by condition
3. Check for consistent outcomes per condition
4. Formulate IF-THEN rule
5. Verify rule on all examples
6. Apply to new case based on its condition

COMMON MISTAKES TO AVOID:
- Not recognizing the conditional nature
- Treating as simple alternating pattern
- Ignoring the shape property (open/closed)
- Applying wrong transformation for given condition
- Missing the IF-THEN logical structure

Question 14

Identify the geometric transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: What shape comes next?
PATTERN ANALYSIS:
Step 1: Identify each shape by counting sides
- Figure 1: 3 sides (triangle)
- Figure 2: 4 sides (quadrilateral)
- Figure 3: 5 sides (pentagon)
- Figure 4: 6 sides (hexagon)

Step 2: Analyze side count progression
- Fig 2 - Fig 1 = 1 sides
- Fig 3 - Fig 2 = 1 sides
- Fig 4 - Fig 3 = 1 sides

RULE HYPOTHESIS:
Each polygon gains one side in sequential transformation

VERIFICATION:
Consistent transformation: +1 side per step โœ“

APPLICATION:
Figure 5: 6 + 1 = 7 sides
Shape: heptagon

GEOMETRIC PRINCIPLES:
- Regular polygons maintain equal side lengths
- Interior angle changes with side count
- Formula: Interior angle = (n-2) ร— 180ยฐ / n

COMMON MISTAKES TO AVOID:
- Miscounting sides in complex polygons
- Confusing vertices with sides
- Not recognizing regular vs irregular polygons
- Missing the consistent arithmetic progression

Question 15

Identify the set operation rule being applied: Figure 1 (Set A): Figure 2 (Set B): Figure 3 (Operation): โˆฉ What is the result (Figure 4)?
SET THEORY PATTERN ANALYSIS:

Step 1: Identify the sets
- Set A (Figure 1): Elements at specific positions
- Set B (Figure 2): Elements at specific positions

Step 2: Identify overlapping elements
- Compare positions in both sets
- Element at (50, 60) appears in BOTH sets

Step 3: Recognize the operation
- Operation symbol: โˆฉ
- Operation type: Intersection (A โˆฉ B)

RULE HYPOTHESIS:
The rule is a Intersection (A โˆฉ B) operation

SET OPERATION DEFINITION:
Intersection (A โˆฉ B) contains only elements common to both sets

APPLICATION:
Set A has elements: {(40, 60), (50, 60)}
Set B has elements: {(50, 60), (70, 60)}

Intersection (A โˆฉ B) result:
- Common elements: {(50, 60)}
- A-only elements: {(40, 60)}
- B-only elements: {(70, 60)}

Result depends on operation:
- Union: All unique = {(40, 60), (50, 60), (70, 60)}
- Intersection: Common only = {(50, 60)}
- Difference: A-only = {(40, 60)}

SET THEORY PRINCIPLES:
- Union: A โˆช B = {x | x โˆˆ A OR x โˆˆ B}
- Intersection: A โˆฉ B = {x | x โˆˆ A AND x โˆˆ B}
- Difference: A โˆ’ B = {x | x โˆˆ A AND x โˆ‰ B}

COMMON MISTAKES TO AVOID:
- Confusing union with intersection
- Forgetting to remove duplicates in union
- Wrong order in difference operation (Aโˆ’B โ‰  Bโˆ’A)
- Miscounting common elements

Question 16

Detect the rule governing the number of elements: Figure 1: Figure 2: Figure 3: Figure 4: What comes next?
PATTERN ANALYSIS:
Step 1: Count elements in each figure
- Figure 1: 2 squares
- Figure 2: 3 squares
- Figure 3: 4 squares
- Figure 4: 5 squares

Step 2: Calculate differences between consecutive figures
- Fig 2 - Fig 1 = 1
- Fig 3 - Fig 2 = 1
- Fig 4 - Fig 3 = 1

RULE HYPOTHESIS:
The number of squares is increasing by 1 in each step

VERIFICATION:
All consecutive differences are consistent: +1 โœ“

APPLICATION:
Figure 5 should have 5 +1 = 6 squares

COMMON MISTAKES TO AVOID:
- Miscounting elements in figures
- Not checking all consecutive differences
- Assuming non-linear progressions too early

Question 17

Identify the complex positional movement rule: Figure 1: Figure 2: Figure 3: Figure 4: Where should the dot appear next?
PATTERN ANALYSIS:
Step 1: Track the position of the dot in each figure
- Figure 1: Position at (85, 60)
- Figure 2: Position at (60, 85)
- Figure 3: Position at (35, 60)
- Figure 4: Position at (59, 35)

Step 2: Analyze movement vectors
- Fig 1โ†’2: ฮ”x = -25, ฮ”y = 25
- Fig 2โ†’3: ฮ”x = -25, ฮ”y = -25
- Fig 3โ†’4: ฮ”x = 24, ฮ”y = -25

Step 3: Detect movement pattern
The dot follows a circular path (90ยฐ steps clockwise)

RULE HYPOTHESIS:
Systematic positional movement following circular path (90ยฐ steps clockwise)

VERIFICATION:
All movements conform to the identified pattern โœ“

APPLICATION:
Next position: (85, 59)
Following the established circular path (90ยฐ steps clockwise)

ADVANCED TECHNIQUES:
- Plot positions on coordinate system
- Check for symmetry and periodicity
- Analyze velocity and acceleration vectors
- Consider boundary conditions

COMMON MISTAKES TO AVOID:
- Assuming simple linear movement
- Not considering boundary reflections
- Missing rotational or circular patterns
- Ignoring spatial constraints

Question 18

Identify the conditional transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: If the next shape is a closed triangle, what marking should it have?
CONDITIONAL RULE ANALYSIS:

Step 1: Classify each figure
- Figure 1: Closed shape (circle) โ†’ has DOT inside
- Figure 2: Open shape (arc) โ†’ has LINE segment
- Figure 3: Closed shape (square) โ†’ has DOT inside
- Figure 4: Open shape (curve) โ†’ has LINE segment

Step 2: Identify the conditional pattern
Check correlation between shape type and marking:
- ALL closed shapes โ†’ contain dots โœ“
- ALL open shapes โ†’ contain lines โœ“

CONDITIONAL RULE HYPOTHESIS:
IF shape is CLOSED โ†’ THEN add dot inside
IF shape is OPEN โ†’ THEN add line segment

VERIFICATION:
Test hypothesis against all figures:
- Figure 1: Closed + Dot โœ“
- Figure 2: Open + Line โœ“
- Figure 3: Closed + Dot โœ“
- Figure 4: Open + Line โœ“

Rule verified across all cases โœ“

APPLICATION:
Given: Next shape is a CLOSED triangle
Apply rule: IF closed โ†’ THEN add dot
Result: Triangle with dot inside

BOOLEAN LOGIC FRAMEWORK:
- Condition: IsClosed(shape)
- True branch: AddDot()
- False branch: AddLine()

CONDITIONAL RULE DETECTION STRATEGY:
1. Identify potential condition variables
2. Classify all examples by condition
3. Check for consistent outcomes per condition
4. Formulate IF-THEN rule
5. Verify rule on all examples
6. Apply to new case based on its condition

COMMON MISTAKES TO AVOID:
- Not recognizing the conditional nature
- Treating as simple alternating pattern
- Ignoring the shape property (open/closed)
- Applying wrong transformation for given condition
- Missing the IF-THEN logical structure

Question 19

Identify the geometric transformation rule: Figure 1: Figure 2: Figure 3: Figure 4: What shape comes next?
PATTERN ANALYSIS:
Step 1: Identify each shape by counting sides
- Figure 1: 3 sides (triangle)
- Figure 2: 2 sides (2-gon)
- Figure 3: 1 sides (1-gon)
- Figure 4: 0 sides (0-gon)

Step 2: Analyze side count progression
- Fig 2 - Fig 1 = -1 sides
- Fig 3 - Fig 2 = -1 sides
- Fig 4 - Fig 3 = -1 sides

RULE HYPOTHESIS:
Each polygon loses one side in sequential transformation

VERIFICATION:
Consistent transformation: -1 side per step โœ“

APPLICATION:
Figure 5: 0 - 1 = -1 sides
Shape: -1-gon

GEOMETRIC PRINCIPLES:
- Regular polygons maintain equal side lengths
- Interior angle changes with side count
- Formula: Interior angle = (n-2) ร— 180ยฐ / n

COMMON MISTAKES TO AVOID:
- Miscounting sides in complex polygons
- Confusing vertices with sides
- Not recognizing regular vs irregular polygons
- Missing the consistent arithmetic progression

Question 20

Identify the set operation rule being applied: Figure 1 (Set A): Figure 2 (Set B): Figure 3 (Operation): โˆช What is the result (Figure 4)?
SET THEORY PATTERN ANALYSIS:

Step 1: Identify the sets
- Set A (Figure 1): Elements at specific positions
- Set B (Figure 2): Elements at specific positions

Step 2: Identify overlapping elements
- Compare positions in both sets
- Element at (50, 60) appears in BOTH sets

Step 3: Recognize the operation
- Operation symbol: โˆช
- Operation type: Union (A โˆช B)

RULE HYPOTHESIS:
The rule is a Union (A โˆช B) operation

SET OPERATION DEFINITION:
Union (A โˆช B) combines all elements from both sets (no duplicates)

APPLICATION:
Set A has elements: {(40, 60), (50, 60)}
Set B has elements: {(50, 60), (70, 60)}

Union (A โˆช B) result:
- Common elements: {(50, 60)}
- A-only elements: {(40, 60)}
- B-only elements: {(70, 60)}

Result depends on operation:
- Union: All unique = {(40, 60), (50, 60), (70, 60)}
- Intersection: Common only = {(50, 60)}
- Difference: A-only = {(40, 60)}

SET THEORY PRINCIPLES:
- Union: A โˆช B = {x | x โˆˆ A OR x โˆˆ B}
- Intersection: A โˆฉ B = {x | x โˆˆ A AND x โˆˆ B}
- Difference: A โˆ’ B = {x | x โˆˆ A AND x โˆ‰ B}

COMMON MISTAKES TO AVOID:
- Confusing union with intersection
- Forgetting to remove duplicates in union
- Wrong order in difference operation (Aโˆ’B โ‰  Bโˆ’A)
- Miscounting common elements
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