http://img255.imageshack.us/img255/3518/aa2gc9.jpg

Hi all,

Once again I'm pretty stumped at this one.

3^3 =27

3^4 = 81

3^5 =243

3^6 = 729

3^7 = 2187

Now these are the same practically. An even second to last digit and a seven as the last digit. So the pattern will loop. Just proving it seems a right pain! :( Any help at all would be appreciated.