On Friday I posted this puzzle:
How can you express the number 100 using six nines and no other digits?
If you have not tried to solve it, have a go now. For everyone else the answer is after the break.
Did you solve it? Any other solutions?
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.