42=164, 73=499, 51= 251, 29=?

Given:

The reasoning problem is

42=164, 73=499, 51= 251, 29=?

To find:

The missing value.

Solution:

In the given reasoning problem, we need to square each digit then write them combinedly.

On combining these two, we get

Similarly,

Using this pattern, we need write the square of 2 and 9 combinedly to find the value of 29.

Therefore, the missing value is 481.