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A box contains \(90\) discs which are numbered from \(1\) to \(90\). If one disc is drawn at random from the box, find the probability that it bears
 
(i) a two-digit number \(=\) ii
 
(ii) a perfect square number \(=\) ii
 
(iii) a number divisible by \(5\) \(=\) ii