Maths 4 Rabbit Question

[kelsolane]

Hi does any body know the answer to the maths riddle seeing in the dark with 4 rabbits having to go through a tunnel only 2 at a time

[Old_Geezer]

Unless one is familiar with the puzzle, one needs more info on it to work it out for you.

[Mexican18]

If you are looking for an answer,it is best to ask the question.

[JJ109]

Is this a rewording of the situation where there is one torch and the 4 "rabbits" take 1, 2, 5 and 10 minutes each respectively to cross and they can only go 2 at a time and must go at the pace of the slowest of the two.

If it is the answer is 17 minutes

1. The two fastest cross (elapsed time 2 minutes)
2. The fastest comes back with the torch (1 minute) - elapsed time now 3 minutes
3. Hands torch to the two slowest who cross (10 minutes) - elapsed time now 13 minutes
4. Hands torch to the second fastest who is already on the other side and he returns (2 minutes) - elapsed time 15 minutes
5. Two fastest cross (2 minutes) - elapsed time 17 minutes

The secret is to get the two slowest rabbits to cross at the same time!

Now if your puzzle is not a rewording of that one, then I guess it is necessary for you to tell us which one it is!

[Toorak]

Crikey!

[Mexican18]

If rabbits eat a lot of carrots,why would they need a torch?