Dr. Johnson decided to check if his physician assistant Anna is smart enough. He prepared three envelopes and put a cheque for $100 in one of the three envelopes.
On the first envelope, he wrote “This envelope does not have the cheque”, on the second envelope he wrote “This envelope has the cheque”, and on the third one he wrote, “The second envelope does not have the cheque”.
Then he told Anna that if she wants to get the cheque, she needs to guess which envelope contains the cheque, without touching the envelopes, just by reading the writings on the envelopes.
He also said that only one writing was true and two others were false.
Which envelope does Anna need to pick up to get the cheque?