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)

Why did she do it? | Rating: 5.00
Posted on 2012-04-19 by Ady TZIDON (Solution Posted, 5 Comments)

Return to Treasure Island |
Posted on 2012-04-05 by broll (No Solution Yet, 14 Comments)

Boosted board | Rating: 4.00
Posted on 2012-02-07 by Jer (Solution Posted, 11 Comments)

It is not that easy | Rating: 3.67
Posted on 2012-01-01 by Ady TZIDON (Solution Posted, 3 Comments)

Multiply Month and Day |
Posted on 2011-11-12 by K Sengupta (Solution Posted, 2 Comments)

Avoid ambiguity | Rating: 4.00
Posted on 2011-10-12 by Ady TZIDON (No Solution Yet, 2 Comments)

The Scenic Route |
Posted on 2011-09-15 by Gamer (No Solution Yet, 1 Comments)

As easy as... ABC? ...123? | Rating: 4.00
Posted on 2011-08-18 by Ady TZIDON (Solution Posted, 12 Comments)