Question

8080=6 1357=0 2022=1 1999=3 6666=?​

Answer 1

Answer:

The answer is 4.

Step-by-step explanation:

Note the total number of rounds (circles) that form the digits of the number.

For example.

8080 has 6 circles since 8 has two circles and 0 has one. So, two 8s and two 0s collectively will have 6 circles.

Hope this explanation helps.