What is 123456789 = ?

Question:

123 = 0
4235 = 0
656 = 2
5390 = 2
8890 = 6
1001 = 2
19235 = 1

What is 123456789 = ?

Answer:

The answer is 4. You need to calculate the number of closed circles in all the digits like 6 has only 1 closed circle and 8 has 2 closed circles. Then 123456789 has 4 closed circles. (689)

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