You can boost your Prayer level by +2 by Praying at the Monestry (east of Edgeville) :) Using the special of the ancient mace is perfect for boosting prayer level. But you won't be able to use higher level prayers anyway, so it doesn't matter.
Obviously not. Lower the rightmost digit by one unless it's 0 etc, I posted about it on the first page. I.e, don't change any digit other than the last unless the last digit is zero. BB98
No, wrong. It should be BB9B The error you just did is equivalent to if the number was 9980 in base ten and you would post 9899 after that. (However BBA0 is more than twice as big as 9980, but that's besides the point). BB9A
BBB0 It's not very hard, it's like base 10. You lower the rightmost digit by one, unless it's 0 in which case you raise it to B and lower the digit to the left of that digit by one unless it's 0 ect. For example if the number is A340 the next number should be A33B. I hope this didn't cause more confusion.
To make things a bit harder well be using base 12 for this countdown. That means that Ill start by posting 10000, the next person will post BBBB, then BBBA, then BBB9 etc. I expect this to be done by the end of 2015. Rules: No double posting. 10000