2.Mrs.Sanders has three grandchildren,who call her regularly.One calls her every three days,one calls her every four days,and one calls her every five days.All three called her on December 31,2016.On how many days during the next year did she not receive a phone call from any of her grandchildren?( ?。?br />Mrs.Sanders有三個孫子,他們經常給她打電話。其中一個每三天給她打一次,另一個每四天打一次,還有一個每五天打一次。他們三人都在2016年12月31日給她打了電話。在接下來的一年中,有多少天她沒有接到她任何一個孫子的電話?( )