Four people arrive at a river with a narrow bridge that can only hold two people at a time. It's nighttime and they have one torch that has to be used when crossing the bridge. Person A can cross the bridge in one minute, B in two minutes, C in five minutes, and D in eight minutes. When two people cross the bridge together, they must move at the slower person's pace. Can they all get across the bridge in 15 minutes or less?
Answer: Yes, they can cross in exactly 15 minutes.
Explanation: The group of four must follow these steps.
1. First, A and B cross the bridge and A brings the light back. This takes 3 minutes.
2. Next, C and D cross and B brings the light back. This takes another 10 minutes.
3. Finally, A and B cross again. This takes another 2 minutes.
QUESTION> How many eggs do we have in the basket?
Also...
And old man and his apprentice are watching the sunset when exactly 100 seagulls pass flying. They hunt one and the next day there are 99... they hunt another one.
The old man asks the young boy: "After we've hunted them all down, how many seagulls did we watch flying?
QUESTION> How many eggs do we have in the basket?
Also...
And old man and his apprentice are watching the sunset when exactly 100 seagulls pass flying. They hunt one and the next day there are 99... they hunt another one.
The old man asks the young boy: "After we've hunted them all down, how many seagulls did we watch flying?