On 24 Apr 2013 10:42, "Shannon Severance" <<a href="mailto:srs@s53.me">srs@s53.me</a>> wrote: > (define sqrt-n (inexact->exact (ceiling(sqrt n)))) Racket has integer-sqrt, which saves you defining sqrt-n every time. Also worth noting is sqr, which covers the occasions you want (* x x) or (expt x 2) Customer testimonial: > I have used integer-sqrt in lots of Project Euler problems. It has never let me down! > - Tim, Epsom -- sent from my phone consider yourself lucky if you get all the right letters in the right order