Let c who can crack this 5 - 4 = 23

Let c who can crack this

5 - 4 = 23

8 - 1 = 63.

6 -16 = 32

9 - 9 = 78

3 - 9 = 6

3 - 81 = ?

Genius heads try this & explain the logic

The ans is,

(5^2 =25) – (√4=2) = 23

(8^2 =64) – (√1=1) = 63

(6^2 =36) – (√16=4) = 32

(9^2 =81) – (√9=3) = 78

(3^2 =9) – (√9=3) = 6

(3^2 =9) – (√81=9) = “0”