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1) In the arrangement below, each number is the non-negative difference of the two numbers above it to which it is attached. What is the sum of the four greatest distinct possible values for z?

2)Among all fractions  \(x\)that have a positive integer numerator and denominator and satisfy\(\frac{9}{11} \le x \le \frac{11}{13}\)

which fraction has the smallest denominator?

 Oct 1, 2018
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See the answer here: https://web2.0calc.com/questions/in-the-arrangement-below-each-number-is-the-non-negative

 Oct 1, 2018

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