I have posted you a link below, hope it helps. I have pasted a link to the guide in the "Related Links" section below.
You use your imp to scare him.
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
Simple, get more exp than him/her/it in skills.
This event has already been and gone.
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
this is no longer avalible... i am very sorry
For help, go to the related link below.
go to link below
He is at the end of ape troll dungeon
The only ones I know is to beat random events.