Question

A certain convention was exactly attended by 100 politicians. We are given the following 2 facts.

1) Arvind Kejriwal is present. He is known to be honest.
2) If you choose any 2 politicians randomly at the convention, at least one of them will be crooked (not honest).

Of the 100 politicians present, how many are crooked?

Answer 1

If you select two people and at least 1 has to be crooked, that means that all but one have to be crooked.