A problem by Dwipa Nusantara Al Farisi

Level pending

-Albert and Bernard just friends with Cheryl and they wanted to know his birthday . Cheryl then give 10 options , namely :

May 15, May 16 , May 19 June 17, June 18 July 14, July 16, August 14, August 15, and August 17

-Then , Cheryl told Albert and Bernard separately on the month and date of his birthday sequentially .

-Albert and Bernard then made ​​a statement :

Albert : I do not know when Cheryl 's birthday , but I'm sure Bernard does not know well .

Bernard : At first I did not know Cheryl 's birthday , but I now know .

Albert : It means I also know Cheryl 's birthday .

So when Cheryl 's birthday ?

--source : Kenneth Kong --

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