U2 has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge.

You must help them cross to the other side. It is night and there is ONLY one flashlight. A maximum of two people can cross at one time.

Any party who crosses (either 1 or 2 people) must have the flashlight with them.

The flashlight must be walked back and forth, it cannot be thrown, rolled, transported, teleported etc etc ... across the bridge. Each band member walks at a different speed and a PAIR of men walking across the bridge will travel at the speed of the slowest member of it's party.

The Paces:
Bono: 1 minutes to cross.
The Edge: 2 minutes to cross.
Adam: 5 minutes to cross
Larry: 10 minutes to cross.

Example. If Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, 20 minutes has elapsed and you've failed your mission.

[keep scrolling]

The Answer:

Bono & Edge go over = 2

Edge comes back = 2

Adam & Larry go over = 10

Bono comes back = 1

Bono & Edge go over = 2

Total: 17 minutes.

[pretty easy eh!?]