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)

I am 521634352 | Rating: 3.00
Posted on 2021-11-08 by K Sengupta (Solution Posted, 4 Comments)

SOD revealed | Rating: 5.00
Posted on 2021-08-26 by Ady TZIDON (No Solution Yet, 3 Comments)

The incompatible food triad |
Posted on 2021-04-27 by Ady TZIDON (No Solution Yet, 18 Comments)

quadratic ^ quadratic | Rating: 4.00
Posted on 2021-04-06 by Larry (Solution Posted, 5 Comments)

Don't walk! | Rating: 4.33
Posted on 2021-03-24 by Ady TZIDON (No Solution Yet, 16 Comments)

Pentagon rays |
Posted on 2020-10-09 by Danish Ahmed Khan (No Solution Yet, 0 Comments)

A coded text |
Posted on 2020-06-26 by Ady TZIDON (Solution Posted, 5 Comments)

Define my profile | Rating: 4.00
Posted on 2020-04-01 by Ady TZIDON (No Solution Yet, 7 Comments)