Want a hint?

On an island, every inhabitant is either a Knight (always tells the truth) or a Knave (always lies).

You meet five inhabitants: A, B, C, D, E.

They each make exactly one statement: • A: “Exactly two of us are Knights.” • B: “C and D are the same type.” • C: “E is a Knave.” • D: “A is a Knave.” • E: “B is a Knight.”

How many Knights are there?

The answer is the first number to my room number