Question

If \( 9 + 1 = 81 \), \( 5 + 2 = 49 \), then \( 7 + 3 = \) ?

• A. 64
• B. 70
• C. 100
• D. 81

Hint:

For reasoning-based puzzles, always test patterns like squaring, reversing, or alternate operations before concluding.

Answer 1

The Correct Option is C

Step 1: Determine the rule from the provided examples
Example 1: \[9 + 1 = 81 \quad \Rightarrow \quad 9 \times 9 = 81 \] Example 2: \[5 + 2 = 49 \quad \Rightarrow \quad 7 \times 7 = 49 \] The established rule is: \[(a + b)^2\] Step 2: Apply the derived rule to the expression \(7 + 3\)
\[7 + 3 = 10 \quad \Rightarrow \quad 10^2 = 100\]