Question

If 9999=4 8888=8 1816=6 . 1212=0 Then, 1919=?

Answer 1

9999 has 4 enclosed areas.
8888 has 8 enclosed areas.
1816 has 3 enclosed areas and 2 other digits(So 3x2=6)
1212 has 0 enclosed areas(So 0x4=0)
Similarly,
1919 has 2 enclosed areas and 2 other digits
So, 2x2=4 is the answer.

Answer 2

Hi Mate
Your Answer is

This is a puzzle Question just see and count the hole on No.
There are 4 circles in 9999 (One circle in each 9).
8 circles in 8888 (2 circles in each 8).
1816 has 3 circles in it.(2 circles in 8 and one circle in 6).
1212 has 0 circles.

1919 has 2 circles in it.(One circle in each 9).

So 1919 = 2

Hope u underestand it