I'm not going to answer this one because I've seen something very similar before.
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Here's a riddle...
You need to take a fox, a chicken and some grain across a river. Your boat is just big enough to carry yourself and only one of the three items.
If you leave the fox and the chicken together, the fox will eat the chicken. If you leave the chicken and grain together, the chicken will eat the grain.
How do you safely get the fox, chicken, and grain to the other side of the river?