A mint prepares metallic calendars specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of February calendars should it prepare to serve for all the possibilities in the future years?

Answer

14

Explanation

There are two types of Februaries, one having 28 days and the other having 29 days.
So, there are 2 ways of preparing calendars for February.
Also, the month may start from any day from Monday to Sunday. So, there are 7 ways of preparing it for various days.
Hence, the required number of plates `=(2xx7)=14.`