6,292,015 is a composite, Duffinian, odd, semiprime, square-free and unprimeable number.
Answers to Last Fridays Brain’o Quiz:
1. Alaska has islands on the other side of the international date line, so their longitude is measured going east of the Greenwich meridian. The rest of the US is measured going west.
4. Just 4. Page 53 and 54 are on the same piece of paper.
5. They did not duel each other.