Solve this logic number sequence puzzle 8080 = 6 then 6666 = ?

Advertisement
Solve this logic number sequence puzzle 6666 = ?
Solve this logic number sequence puzzle by the correct digit

8080 = 6
1357 = 0
2022 = 1
1999 = 3
6666 = ?

Click here for Answer

The answer is 4
The number of circles formed by digits in 6666 = 4