Originally posted by mdchachi
I'm not really sure but it looks like you pretty much got it. Here are the changes I'd make to what you wrote:
1. Biriyaudo wo suru toki hajime ni tama wo chirashitara dono kakudo de uchimasuka?
2. Netto de no [3 ball] wo suru toki 0 do kara 15 do madeno aida nara dono kakudo kara utte mo tama no ugoki wa hotondo onaji da to omoimasu.
3. 25 (kaku) do demo sukunakutemo 1 tama wo uteru to omoimasu.
These are just guesses. Best to check with a billiards-knowledgeable NS in this case.