Dragon Ball Z Trivia

This is Dragon ball Z trivia! This is how it work's:(I'm P1)
P1 Start's off: how many sons do goku have?
P2: Goku Has 2 son's:: Gohan and Goten; who kill's goku for the first time in dbz?
P3: His brother::radiz; how many sayian's are alive?

See, one person asks a and then asks a new one! This was Tov.'s way to play his/her game. so this is it =P
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Who Removed Gohan's Tail?

Piccolo removed his tail!

Where does Gohan first go super saiyan?

Hmmm not to sure if this type of thread is allowed.
So for now I'll be placing it in the basket.