10 Jan
2006
10 Jan
'06
9:13 a.m.
For a number n, let f(n) be the set of numbers gotten by splitting n^2 at the 0 digits. For example 29648^2 = 879003904 so f(29648) = { 4, 39, 879 } Let S be the smallest set of numbers containing 2 and fixed by f. What is the largest element of S? -------------------------------- - David Wilson