Number System
The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:

5/4
4/5
3/5
3/10

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Number System
The sum of five consecutive odd numbers of set p is 435. What is the sum of five consecutive numbers of another set q. Whose largest number is 45 more than the largest number of set p?

770
530
730
670

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