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Subject :IMO    Class : Class 8
A riddle for you guys: Find the number, which has this amazing property that the product of the number and its reciprocal is the same as their difference.

Ans 1:

Class : Class 10
There exist two such numbers : (1-sqrt(5))/2 and (1+sqrt(5))/2 This can be taken out by making a quadratic equation and using the discriminant formula, which is: x=(b*sqrt(b^2-4ac))/2a

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