Question:medium

Following question consists of four problem figures marked A, B, C, d and five answer figures marked 1 2 3 4 and 5. Select a figure from amongst the answer figures which will conitnue the series established bu the four problem figures [width=0.4]Q87.png

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Focus on the core transformation: rotation, reflection, number of elements, or pattern change. Ignore superficial details.
Updated On: Jun 15, 2026
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Show Solution

The Correct Option is C

Solution and Explanation

Step 1: Understanding the Concept:
This is a visual number puzzle where the values inside the central inner sections (triangles) are derived from a mathematical operation applied to the adjacent numbers in the outer sections (semi-circles).
Step 2: Key Formula or Approach:
Analyze the relationship between the outer boundary numbers and the inner central numbers. Test basic arithmetic operations (addition, subtraction, multiplication) between adjacent outer segments moving in a clockwise direction.
Step 3: Detailed Explanation:
Let us verify the pattern by adding consecutive adjacent numbers on the outer edge, moving clockwise:
1. Top Inner Number: Add the Top outer number (12) and the Right outer number (15). \[ 12 + 15 = 27 \] This perfectly matches the number in the top inner section.
2. Right Inner Number: Add the Right outer number (15) and the Bottom outer number (11). \[ 15 + 11 = 26 \] This matches the number in the right inner section.
3. Bottom Inner Number: Add the Bottom outer number (11) and the Left outer number (18). \[ 11 + 18 = 29 \] This matches the number in the bottom inner section.
4. Left Inner Number (?): Following the exact same logic, add the Left outer number (18) and the Top outer number (12) to find the missing value. \[ ? = 18 + 12 = 30 \]
Step 4: Final Answer:
The number that shall come in place of '?' is 30.
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