100	for i = 1 to 40 step 5
105		n = 40-i
110		dim a(n,n), b(n,n)
115		start = cpu
120		mat a = rnd
130		mat b = inv(a)
140		print 'n: '; n; 'took '; cpu-start; 'seconds, det(b) = '; det(b)
150	next i
160	end
