I Have a Dream!

January 20, 2020

The third Monday of January is the holiday commemorating the birthday of Martin Luther King, Jr. The first time Martin Luther King Jr. Day was celebrated was in 1986. Try to solve these problems without using a calendar!

How many times has Martin Luther King Jr. Day been celebrated?

 

How many times since 1986 has Martin Luther King Jr. Day actually been celebrated on his birthday, January 15th?

 

What is the probability Martin Luther King Jr.’s actual birth date falls on the third Monday in January?

 

Does a decade exist in which Martin Luther King Jr. Day will not be celebrated at least once on his birthday, January 15th? On which days could Martin Luther King Jr. Day be celebrated throughout this decade?

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