Understanding the Phrase 'no sé'

What is the basic meaning of the phrase 'no sé' in Spanish?

• I am sure

• I don't know

• I will go

• I am happy

In which situation would you most likely use 'no sé'?

• When you are making a promise

• When you are greeting someone

• When you are unsure about an answer

• When you are certain about something

Which of the following is a variation of 'no sé' used in advanced contexts?

• Voy a saber

• No tengo idea

• Sé todo

• Estoy seguro

How can 'no sé' be used to express uncertainty in a conversation?

• By giving a command

• By indicating lack of knowledge

• By asking a question

• By stating a fact

What is a common response when someone says 'no sé'?

• That's incorrect

• I don't care

• You must know

• Let me explain