Exam Maths Puzzle Numerical Ability Age Problem

how do we distribute 63 rupees into minimum no. of coins , so that any sum from 1 to 63 is available.

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Exam Other Question
how many number have ever decreasing digits (eg.98640 or 732 or 81)? please note that none of the following are ever decreasing numbers 2 or 9 or 12 or 443 or 5298..
a.10!/9
b,2!/1+3!/2..........+9!/8+10!/9
c.2!/2+3!/2..........+9!2+10!/2
d.2^10-11 If a user can type a content on 20 sheets, one sheet having 55 lines and a line can contain 65 characters. The content is again retyped in a new set of sheets having 65 lines and each line can contain 70 characters. Calculate the reduction in number of sheets.
a) 25
b) 10
c)15
d)20