खालील आकृतीमधील प्रश्नचिन्हाच्या जागी कोणती संख्या येईल?

: Numerical Grid

Step 1: Analyze the given grid to find a pattern.
The grid is:

2 | 3 | 13
--|---|---
4 | 5 | ?
--|---|---
6 | 7 | 64

Let's examine the relationship between the first two numbers ($a$ and $b$) and the third number ($c$) in each row.

Step 2: Check Row 1.
Numbers are $a=2$, $b=3$, $c=13$.
Let's try the pattern $a^2 + b^2 = c$: