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Here i attached mobile application Link
I want to know the logic of this application
1:- It have four screens and every screen have numbers.
2:-Application asked on every screen "Do you Know your age is here in these numbers".
3:-If i see the number is on the screen then i pressed "Yes" otherwise press "NO".
4:-This procedure repeat 4 times and application fined out the number or age that is in my mind.
Help me the Logic of this Application using Math.