I have seen this one on the interwebs a few times. I don’t know if I buy the pre-schooler claim. It could be that it took me way more than 5 min to figure it out and I am just bitter. If your brain overheats trying to figure it out, go to Google image search and lookup this number 241543903
2
we have a guess of 2, anyone agree or have a different answer?
2
2222=0
5555=0
1111=0
0000=4
9999=4
8809=6 so 88=4, or 8=2