There is no way to "beat" RuneScape. Your progress is saved as you get stronger but there is no way to complete the game. There is always new game content coming out so there is an endless supply of things to do. But if you want to be the say you beat it, you have to complete all quests (they keep adding more), have level 99 in all skills (120 for Dungeoneering), all achievement diaries complete, etc.
To beat jack on runescape, you need to slide on the ice and bump into him.
tip.it/runescape is a good website to use.
look on runehq
This event has already been and gone.
Simple, get more exp than him/her/it in skills.
Refer to the related link below.
By following all the requirements for the quest or you can go on a runescape help site. Here's one: www.runehq.com
He is at the end of ape troll dungeon
this is no longer avalible... i am very sorry
For help, go to the related link below.
go to link below
The only ones I know is to beat random events.