# The Collapsing Bridge Puzzle

### The Puzzle:

A bridge will collapse in 17 minutes.

4 people want to cross it before it will collapse. It is a dark night and there is only one torch between them.

Only two people can cross at a time.

"A" takes a minute to cross.

"B" takes 2 minutes.

"C" takes 5

and "D" takes 10 minutes

How do they all cross before the bridge collapses?

4 people want to cross it before it will collapse. It is a dark night and there is only one torch between them.

Only two people can cross at a time.

"A" takes a minute to cross.

"B" takes 2 minutes.

"C" takes 5

and "D" takes 10 minutes

How do they all cross before the bridge collapses?

-\./^\./-

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