Here I present you with some old problems from J.A.H. Hunter.
Rules:
Using all four ditgits each time, one of each but no other digits at all, you form expressions for the successive
numbers from one up, until you can't go further. Any arithmetical signs may be used, but no factorial or summation symbols in the first 6 questions. You may
use roots, powers, decimals (both regular and repeating).
Example:
15 = (5*(3-1))+5
16 = 5*3 + 1^5
17 = (15+5)-3
18 = (55-1)/3