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We have three people with one envelope each. One of the envelopes hides a secret formula. They tell us the following:

Person 1

- The formula is not here

- The formula is in envelope 2

Person 2

- The formula is not in envelope 1

- The formula is in envelope 3

Person 3

- The formula is not here

- The formula is in envelope 1

In one of them his two statements are true, in another the two false and in another one false and the other true.

**Where is the formula?**

#### Solution

The formula is in envelope 3.

Between us, in my opinion, this is obvious. Have you tried searching google.com?

Bravo, I think this is a brilliant idea.

Oddly enough, but it is not clear

I have thought and have deleted the thought

I think you are wrong. Enter we'll discuss it.