Second+Round

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To user:Flame., user:SuperMonkeys, user:ShaferS, user:CKProductions, and user:charlottechikorita, please answer the following questions:

1. 2. 3. What is the only integer value of for which  is a positive prime number? 4. What is the smallest positive integer such that, out of the  fractions  where, exactly half of the fractions give a terminating decimal? 5. There exist several positive integers such that  is a terminating decimal. What is the second smallest such integer? 6. Simplify. 7. If is written as a fraction  where  and  are positive integers with a greatest common divisor of 1, what is ? 8. What is 15683*15683 - 15660*15706? (Don't actually get out a calculator and do it, there's an easy way) 9. When a rhombus has diagonals //x// + 2 and //x// with area 24, what is the perimeter? 10. What is the volume of a cone with radius 10 and slant height 13? Express in terms of pi.

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