Liam mailed 8 invitations to his birthday party. If one invitation went to each of his friends, how many friends did Liam invite to his party?

What do you think?

All of his friends

To find out how many friends Liam invited to his party, you can simply count the number of invitations he mailed. In this case, Liam mailed 8 invitations. Therefore, Liam invited 8 friends to his birthday party.