This Bheja Fry question don't require mathematical knowledge !!!
Question
If 9999 = 4
8888 = 8
6688 = 6
Then 4466 = ??
Answer
Please don't try to put mathematical formulae over here !!!
Just look at the number 9.
It is having one circle in the upper part !!!
In the first row, we have 9999. So, 4 circles.
Now look at the number 8.
It is having two circles on both upper and lower parts !!!!
In the second row, we have 8888.. So, 8 circles.
Same way,
In the third row, we have 6688.
Total number of circles in the number 6688 is 6.
On the same logic,
In the fourth row we have 4466.
Number 4 don't have circles, it has only empty space !!!
But number 6 has one circle in it.
Number 4466 has 2 6s.
Total number of circles only 2 !!!!
Hence 9999 4
8888 8
6688 6
4466 2