The head of the department told two professors (Alice and Bob) that one of them is one year older than the other but certainly both of them were born after 1949. Then one has heard the following dialogue:

A: I do not know what year you were born.
B: I do not know what year you were born either.
A: I do not know what year you were born either.
B: I do not know what year you were born either.
A: I do not know what year you were born either.
B: I do not know what year you were born either.
A: Now I know what year you were born.
B: Then I also know what year you were born.

How old are Alice and Bob? (You may assume that Alice and Bob know their own birthdays)

The Bard as a source |
Posted on 2012-11-09 by Ady TZIDON (No Solution Yet, 3 Comments)

Missing digit | Rating: 3.33
Posted on 2012-11-03 by Danish Ahmed Khan (No Solution Yet, 3 Comments)

Four Four-letter words |
Posted on 2012-10-03 by Ady TZIDON (Solution Posted, 3 Comments)

A silly opinion |
Posted on 2012-09-11 by Ady TZIDON (No Solution Yet, 3 Comments)

Wordates | Rating: 5.00
Posted on 2012-09-03 by K Sengupta (No Solution Yet, 7 Comments)

Squares in a Triangle |
Posted on 2012-08-01 by brianjn (Solution Posted, 4 Comments)

GIPSY ROAD: | Rating: 5.00
Posted on 2012-07-12 by Ady TZIDON (No Solution Yet, 20 Comments)