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 = 35 units
- Figure 2: radius = 30 units
- Figure 3: radius = 25 units
- Figure 4: radius = 20 units
Step 2: Calculate size changes between consecutive figures
- Fig 1 → 2: 30 - 35 = -5 units
- Fig 2 → 3: 25 - 30 = -5 units
- Fig 3 → 4: 20 - 25 = -5 units
RULE HYPOTHESIS:
The circle radius decreases by 5 units (linear progression)
VERIFICATION:
All consecutive differences are consistent: -5 units ✓
APPLICATION:
Figure 5 radius = 20 + -5 = 15 units
SCALING PATTERN TYPES:
- Linear arithmetic progression: constant d = -5
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
Step 1: Measure the radius of circles in each figure
- Figure 1: radius = 35 units
- Figure 2: radius = 30 units
- Figure 3: radius = 25 units
- Figure 4: radius = 20 units
Step 2: Calculate size changes between consecutive figures
- Fig 1 → 2: 30 - 35 = -5 units
- Fig 2 → 3: 25 - 30 = -5 units
- Fig 3 → 4: 20 - 25 = -5 units
RULE HYPOTHESIS:
The circle radius decreases by 5 units (linear progression)
VERIFICATION:
All consecutive differences are consistent: -5 units ✓
APPLICATION:
Figure 5 radius = 20 + -5 = 15 units
SCALING PATTERN TYPES:
- Linear arithmetic progression: constant d = -5
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