CLEAN : Worshippers pray in Mecca's Grand Mosque as Kingdom drops social distancing

What is the significance of the number '3' in the context of this video?

• It is the number of sections in the video.

• It is the number of questions in the quiz.

• It represents a mathematical constant.

• It is a placeholder for a concept.

Which of the following best describes the term 'Not' as used in the video?

• A mathematical operation.

• A logical negation.

• A type of punctuation.

• A placeholder for a number.