Valentin Mihov's Blog

Random pieces of wisdom about technology

A task for admission of gifted children in Japan

This is a task that was given to a group of children for admission in kindergarten for gifted children in Nagoya, Japan. 74% of the children solved it. A hint: they were able to count up to 10.

8809 = 6
7111 = 0
2172 = 0
6666 = 4
1111 = 0
3213 = 0
7662 = 2
9312 = 1
0000 = 4
2222 = 0
3333 = 0
5555 = 0
8193 = 3
8096 = 5
7777 = 0
9999 = 4
7756 = 1
6855 = 3
9881 = 5
5531 = 0
6782 = ?

Send me a private message in twitter or via email and I will tell you if your answer is correct :-).