123=0
4235=0
656=2
5390=2
8890=6
1001=2
19235=1
What is 123456789?
Answer: 4 - You need to count the number of closed circles.
This riddle appears in the following downloadable PDF files:
Can you solve one of the most famous logic puzzle ever?
Memory Matching game for kids, adults and seniors.
Connect the matching tiles and pop them all.