The first one missed out on a number - It must be 0

4) http://web2.0calc.com/questions/how-to-calculate-compound-interest

5) http://web2.0calc.com/questions/evaluate30-mod-899

6) http://web2.0calc.com/questions/what-are-the-last-2-digits-of-7-2800

I think these one might be ok

Melody Nov 22, 2014