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)** a perfect square number.

**(iii)** a number divisible by 5.

**(i)** a two digit number.

**(ii)** a perfect square number.

**(iii)** a number divisible by 5.