The car is parked in which parking lot number?

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There are 9 balls that are identical. Only one ball is heavier than the rest. You also have a two-armed scale with which to measure the weight of the balls. How can you find the heavier ball by using the scale only twice?

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There are two boys participating at an international maths contest in December 2013. One is British and the other is American. They both write their names, the date, and their answers on the paper. The only problem is that they both have the same name and the papers cannot be told apart.

What is the date?

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Two men catch two fishes in 2 minutes. At this rate, how many men are needed to catch 500 fishes in 500 minutes?

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There are three jars filled with candies. One jar is filled with banana candies, one jar is filled with lemon candies and one jar has a mix of both. All the jars are mislabelled (i.e. all the jars have wrong labels about what kind of candies they contain).

All the candies look very similar in shape, size and color and they even smell the same. The only way to distinguish them is by tasting.

You have to eat one and only one candy to determine the correct jar labels. You can eat that one candy from any jar you want as long as you eat only one in total.

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