Lets assome you are playing in a 10 player game where each player is given a random number between 1 and 100.
The betting structure is the same as the first betting round in a poker game, where you can either fold, call or raise.
Think about what numbers you would raise or call with as your position changed around the table.
What numbers do you call a raise with?
What numbers do you reraise with?
What is the difference in your relative number value if other players have limped in, as opposed to when it is folded to you?

Now after we have considered this, how does hold em differ from this game preflop?
The most obvious difference to me is relative hand values in holdem change depending on the number of players you are up against.

Think about the hands KQs and A8o. Which is a better hand at a full table and why? How do these values change when you are heads up?
The "worst" hand in hold em most players know to tell you is 72o. But heads up if you had the choice between 72o and 23s to run hot and cold, which would you choose?

Since hand values change with the number of players, and with position, how should your raising standards change as it is folded to you based on the number of players yet to act?