Question

Select the missing number from the given responses.
64 36 2
81 25 4
144 16 ?

• A. 6
• B. 8
• C. 3
• D. 16

Hint:

Look for squares, cubes, or roots when you see perfect squares like 64, 81, 144.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Find the relationship row-wise.

Step 2: Detailed Explanation:
Row 1: 64 and 36 are \(8^2\) and \(6^2\). The third number 2 could be \(8 - 6 = 2\).
Row 2: 81 and 25 are \(9^2\) and \(5^2\). \(9 - 5 = 4\).
Row 3: 144 and 16 are \(12^2\) and \(4^2\). \(12 - 4 = 8\). So missing number is 8.

Step 3: Final Answer:
8