معما :riddel

I'm as big as an elephant, but lighter than a feather. What am I? 

The Wind 

What kind of rocks does Frankenstein have in his collection?  

 Tombstones 

 Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?  

 Because they were all married and not single.

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