Random Thoughts.....What Are You Thinking?

You and eight other people are kidnapped and placed on a cruise liner that's set to sink in 9 hours. Each of you have a bracelet on your wrist that has a number on it, 1-9. These bracelets are a detonator used to explode the bomb that's placed in your stomach. If you try to force the bracelet off, you explode and die. The only way to get the bracelets off is if your heart-rate reaches zero (the bracelet is still useable by other people). or win the game. The main purpose of these bracelets is to activate numbered doors (1-9). Once you enter a door, everyone has to enter and confirm that they're inside quickly otherwise you all die. To win the game, you must find and enter the door labeled 9.

3-5 people can enter any given door, and to enter the doors your bracelets need to total the number that's on the door. The way you get the total is to add the numbers up and find their 'digital root'. Say the bracelets add up to 14, you'd take 14, split it into 1 and 4, add those together, which is 5, so the bracelet's 'digital root' is 5.

Anyway, you know eventually there's only going to be one 9 door, and only 5 people max can exit the game. Would you try to kill people early on (possibly take their bracelets and use it for your own purposes), would you wait as long as possible to kill them (around when you find the last door), or would you wait and see what happened?