How to delete Blank Page in Pages?

Click in the toolbar, choose Show Page Thumbnails, select the Show page thumbnail

If there is yellow boundary line without any separation follow the given steps to Create that separation before deleting page/pages... after which you can delete page(s) easily...

1. Make Sure that blinking Cursor arrow is on the previous page to the Page you want to separate...

2.In the (Insert Menu) choose Section Break ...

3. Now bring blinking Cursor to the page you want to delete ...Again click on Insert Menu choose section Break ...

4. You will see that page is being Separate (see the yellow boundary line in thumbnail window) from the rest and now, can delete blank page easily just by pressing Delete option on Keyboard ...