Question 991205
The mystery number is a fraction whose value is less than one.
 The product of the numerator and denominator is a number cubed, and the sum of the numerator and denominator is a number squared.
 The difference between the numerator and denominator is a prime number. What is the mystery number?
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How about {{{1/8}}}
1 * 8 = 8 a cube
1 + 8 = 9 a square
8 - 1 = 7 a prime