Are you clevererererer than an infant?

Got this from the wonders of Facebook, from people whom I (up until now) have considered friends.

“This puzzle”, they claim, “can be solved by an infant in under five minutes. Adults may take up to an hour.”

8809 = 6
5555 = 0
7111 = 0
8193 = 3
2172 = 0
8096 = 5
6666 = 4
1012 = 1
1111 = 0
7777 = 0
3213 = 0
9999 = 4
7662 = 2
7756 = 1
9313 = 1
6855 = 3
0000 = 4
9881 = 5
2222 = 0
5531 = 0
3333 = 0
2581 = ????

I spent nearly three hours staring at it before I snapped and asked Google. It’s STOOPID. But that doesn’t stop me from torturing you lot with it …

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  1. Flo says:

    Easy, try to find the valor of each number…
    0=1
    1=0
    2=0
    3=0
    5=0
    6=1
    7=0
    8=2
    9=1
    2581=2
    By an adult, in 1 minut :D

  2. Oddbloke says:

    But have you considered why those numbers have those values?

  3. jgh says:

    It’s because adults are more likely to see this as a sums problem, children are more likely to see it as a shape counting problem, particularly the less exposed to sums they have been.

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