# American History X - logic puzzle

The image on the right hand side refers to an important
event in American history. What does it refer to? |

# Fake coins - logic puzzle

Suppose you have five bags filled with the same type of coins and
a weigthing machine. One of this bags is completely filled with fake coins, the other bags contain only real ones. A real coin weights
10 gram and a fake one 11 gram. What is the minimal number of times you need to use the weighting machine in order to find the bag with the fake coins? |

# Also having birthday today? - math puzzle

Out of how many people should a group at least consist in order to have that the probability that two persons out of that group are having birthday on the same day, is larger than 1/2? |