Place the cursor at the end of the page before the page where numbering should start
Go to Layout or Page Layout
Select Breaks
Choose Next Page under Section Breaks
Double-click the header or footer on the page where numbering should begin
Turn off Link to Previous
Go to Insert
Select Page Number
Choose the page number position and style
Select Format Page Numbers
Set Start at and enter the desired starting number
Click OK
Delete any page number from earlier sections if needed
Close Header and Footer