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N is a positive integer. If you list the positive integers in rows of N such that the first row contains 1 to N, the second row contains N+1 to 2*N, and so on, then the first row with no prime is immediately followed by another row with no prime. What is N?
(No Solution Yet, 2 Comments) Submitted on 2016-07-27 by Math Man   
Difficulty: 2 of 5 Bonus: In the year 2525... (in Science) Rating: 3.00
You just landed on the planet Olympus IV, famous for its sports competitions. It's a light planet: the average density is one quarter of the Earths average density. It's also a large planet: the diameter is the double of the Earths diameter. The Olympians are giving a high jump competition, and one crew member takes part. You know that on Earth he jumps 1.98 meters. The record at Olympus IV is 3.86 meters. Should you bet your salary on him winning the competition ?
(Solution Posted, 9 Comments) Submitted on 2005-03-14 by Hugo   
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