247. John, Kate and Lenny just came back from trips to the following countries: Mauritania, Nepal, Oman, Peru and Qatar.
Each country was visited by at least one of the travellers.
Each traveller visited either two or three different countries.
Only one traveller visited Qatar.
Every traveller who visited Mauritania went to Nepal as well.
A traveller who visited Qatar did not visit Peru.
John visited all of the countries Kate did.
If Mauritania was visited by exactly two travellers, how many different trips could Lenny have made?

248. Review the facts below.
• John is a demon.
• Erica is not a princess.
• There are no demons who do not have pointed ears.
• Princesses are always blonde and wear a crown.
Based on the information above, which of the following MUST be true?explanation

249. Review the facts below.
• Adam sings in church on Sundays.
• Rachel takes the train to work.
• The sky is never blue, unless Adam sings.
• Trains travel only when the sky is blue.
Based on the information above, which of the following MUST be true?

250. The body of a man who lived on the western coast of Greenland some 4,000 years ago has recently been discovered. Using the DNA in his hair as a basis, researchers determined that the Greenlander belonged to a Paleo-Eskimo culture called the Saqqaq, and that the Saqqaq man's closest living relatives were the Chukchis, people who live at the easternmost tip of Siberia.
Which one of the following best expresses the main conclusion of the argument above?

251. The media continually advises people to lower the mortality rate of car accidents by using seat belts when driving. Moreover, it was the media that made people aware of the importance of strapping in babies and young children. Most people today use car seats designed especially to protect the young child, and the rate of young children who have been killed in car crashes has significantly dropped. Nonetheless, being strapped in the car with a seat belt can itself pose a danger, especially in a burning car. Thus, while paradoxically ignoring the media's advice on how to reduce the risk of being killed in a car crash is bound to decrease the number of people who lose their lives each year in burning vehicles, it is still the rule.
Which one of the following best expresses the main conclusion of the above argument?

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