9,"A farmer wants to cross a river and take with him a wolf, a goat and a cabbage. He has a boat, but it can only fit himself, plus either the wolf, the goat or the cabbage. If the wolf and the goat are alone on one shore, the wolf will eat the goat. If the goat and the cabbage are alone on the shore, the goat will eat the cabbage. How can the farmer bring the wolf, the goat and the cabbage across the river without anything being eaten?","First, the farmer takes the goat across. The farmer returns alone and then takes the wolf across but returns with the goat. Then, the farmer takes the cabbage across, leaving it with the wolf and returning alone to get the goat.","river crossing puzzle","https://parade.com/970343/parade/logic-puzzles/"
10,"Let's pretend we're on the metric system and use kilograms instead of pounds to give us a starting base number of 100. Four people (Alex, Brook, Chris and Dusty) want to cross a river in a boat that can only carry 100kg. Alex weighs 90kg, Brook weighs 80kg, Chris weighs 60kg and Dusty weighs 40kg, and they have 20kg of supplies. How do they get across?","There may be a couple of variations that will work, but here’s one way: Chris and Dusty row across (combined 100kg), and Dusty returns. Alex rows over, and Chris returns. Chris and Dusty row across again, and Dusty returns. Brook rows across with the supplies (combined 100kg), and Chris returns. Chris and Dusty row across again.","river crossing puzzle","https://parade.com/970343/parade/logic-puzzles/"
11,"This famous river crossing problem is known as the ""bridge and torch"" puzzle. Four people are crossing a bridge at night, so they all need a torch—but they just have one that only lasts 15 minutes. Alice can cross in one minute, Ben in two minutes, Cindy in five minutes and Don in eight minutes. No more than two people can cross at a time; and when two cross, they have to go at the slower person's pace. How do they get across in 15 minutes?","Alice and Ben cross first in two minutes, and Alice crosses back alone with the torch in one minute. Then, the two slowest people, Cindy and Don, cross in eight minutes. Ben returns in two minutes, and Alice and Ben return in two minutes. They just made it in 15 minutes exactly.","river crossing puzzle","https://parade.com/970343/parade/logic-puzzles/"
12,"A bad guy is playing Russian roulette with a six-shooter revolver. He puts in one bullet, spins the chambers and fires at you, but no bullet comes out. He gives you the choice of whether or not he should spin the chambers again before firing a second time. Should he spin again?","Yes. Before he spins, there's a one in six chance of a bullet being fired. After he spins, one of those chances has been taken away, leaving a one-in-five chance and making it more likely a bullet will be fired. Best to spin again.","deadly choices puzzle","https://parade.com/970343/parade/logic-puzzles/"
12,"A bad guy is playing Russian roulette with a six-shooter revolver. He puts in one bullet, spins the chambers and fires at you, but no bullet comes out. He gives you the choice of whether or not he should spin the chambers again before firing a second time. Should he spin again?","Yes. Before he spins, there's a one in five chance of a bullet being fired. After he spins, one of those chances has been taken away, leaving a one-in-six chance and making it less likely a bullet will be fired. Best to spin again.","deadly choices puzzle","https://parade.com/970343/parade/logic-puzzles/"
13,"This one could also fall in the lying/truth category. A man is caught on the king's property. He is brought before the king to be punished. The king says, ""You must give me a statement. If it is true, you will be killed by lions. If it is false, you will be killed by the trampling of wild buffalo. If I can't figure it out, I'll have to let you go."" Sure enough, the man was released. What was the man's statement?","""I will be killed by trampling of wild buffalo."" This stumped the king because if it's true, he'll be killed by lions, which would render the statement not true. If it's a lie, he'd be killed by wild buffalo, which would make it a truth. Since the king had no solution, he had to let the man go.","deadly choices puzzle","https://parade.com/970343/parade/logic-puzzles/"
14,"Susan and Lisa decided to play tennis against each other. They bet $1 on each game they played. Susan won three bets and Lisa won $5. How many games did they play?","Eleven. Because Lisa lost three games to Susan, she lost $3 ($1 per game). So, she had to win back that $3 with three more games, then win another five games to win $5.","hard logic puzzle","https://parade.com/970343/parade/logic-puzzles/"
15,"If five cats can catch five mice in five minutes, how long will it take one cat to catch one mouse?","Five minutes. Using the information we know, it would take one cat 25 minutes to catch all five mice (5x5=25). Then, working backward and dividing 25 by five, we get five minutes for one cat to catch each mouse.","hard logic puzzle","https://parade.com/970343/parade/logic-puzzles/"
