I am looking for an algorithm to predict numbers between 0-99. A database is given from where the result can be mined. The database holds two different or similar numbers for a particular day. eg: Monday can have 10 and 87, Tuesday,34 and 5 and so on.
I am fairly new to Data mining any help will be much appreciated.

You have a time-series (a sequence of integer or real numbers) and you want to predict the next.

I think that you mean search for time series prediction. Some simple techniques that could be used is regression. Other techniques are neural networks. And also probabilistic models based on Markov property may also be used. You may need to search a little bit.

Thank you very much I'll have a look at those you mentioned. Please do let me know if there are anymore algorithm I could look at.