Question

johnys father have 5 sons 5th son name?

Answer 1

5th son's name is Johny...
.
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I think...

Answer 2

Johny is the name of the son.

Explanation:

This is a very famous question to test the IQ. The complete question is Johny's father have 5 sons, name of 4 of the sons are Zaze, Zeze, Zize, and Zoze, respectively.

Therefore, the name of the 5th son must be the "name of the 5th son" is Johny. Because there is none other left than Johny in the list of the sons as Johny is also a son of his father.