The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers. What is the difference between the first and the third of these three numbers?
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28 is divided into two parts such that 6 times the first part added to 4 times the second part makes 152. The first part is

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The denominator of a fraction is 5 more than the numerator. If the numerator as well as the denominator is increased by 3, the fraction becomes 5/9. The original fraction is

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