Suppose the steps for the teeth-cleaning algorithm were in this sequence ... clean the teeth and toothpaste would still be put on the brush. But because steps 1 and 2 are in the wrong sequence ...

Doctor Who showrunner Russell T Davies has revealed the secret to his success may be down to a staple part of his morning ...

NARRATION: An algorithm is a list of steps you give to computers to solve a problem or get something done. Imagine that you need to show someone how you brush your teeth. So they can learn how to ...

Next, brushing with a fluoride toothpaste can help remove plaque, bacteria and food particles from the surface of the teeth, the dentist advised. "By brushing after flossing, you are able to ...