Hiding and unhiding rows - two scenarios

I would like a range of rows (66-113) to be hidden by default.

Scenario 1:
If a cell (e65) has a value entered, row 66 will be unhidden. If cell e66 has a value entered, row 67 will be unhidden and so on.

Scenario 2

As above, Rows 66-113 are hidden by default
User enters a number representing the number of rows to be unhidden in cell E7 - this number of rows is then unhidden commencing with row 66.

Can any one advise how to code either or both these scenarios?

Thanks

Ed

Thanks for that Carim - I think it will do the trick.

I have one small problem which is due to total ignorance on my part. I already have a
Worksheet_Change(ByVal Target As Range) macro in this sheet - how do I insert a second one?

Appreciate the help

Ed

Ok - I'll have a go at that

Ed

OK - I managed that and all is working.

Thanks for the help Carim. I really appreciate the way that you don't just give out answers and make me use my brain! It's the best way to learn.

All the best

Ed