How can I delete photos from ipad2?

Hi
I have a group of photos on my ipad2 which I downloaded with icloud (I think) from my PC, I now find that I cannot delete them from ipad . Any solutions?

Do you want to delete a whole album or individual photos?

For an album click Edit on the top right, then click the X next to the album to delete it.

For an individual photo, go into the album, click the top right button (which look like a box with a right pointing arrow in it). Click on the photos you want to delete until a tick marker appears. Then hit the highlighted Red Delete button on the top left.