[Vasu]

I'm not sure if all version work the same, but if they want sequential numbers tell them to try right clicking the lower right corner of a cell and drag it to the end of the column or row they want to fill - when they stop dragging a menu should pop up and they just select series. If they want the same number, just left click the first cells lower right corner and drag to the end of the column or row they want to fill - this should fill all cells with the same number.

But, like I said, I'm not sure if all versions of Excel do that. My version does, so I just left or right click based on how I want the fill.

Yeah, that's alright, but sometimes even left click-dragging fills a series, and that's what makes me wonder.