Numerical Computation and Estimation - General Aptitude - General Aptitude (GA) Previous Year Questions

A 4 × 4 digital image has pixel intensities (U) as shown in the figure. The number of pixels with U ≤ 4 is:

\( P, Q, R, S, X, \) and \( Y \) are distinct single-digit whole numbers taking values from 0 to 9.
\( PQ \) is a two-digit number with \( Q \) being in the units place and \( P \) in the tens place. Similarly, \( RS \) is a two-digit number.
It is known that \( PQ \) and \( RS \) are consecutive numbers and \( (PQ)^2 + (RS)^2 = XYP \), with \( XYP \) being a three-digit number.
The value of \( Y \) is ________.