Archive for the 'logic' Category

which day?

09Mar07

“what day of the week was
July 8, 1954,” what formula would you use to answer the question
(possibly in your head) without looking at a calendar?

Here is a standard method suitable for mental computation:

(1) Take the last two digits of the year.
(2) Divide by 4, discarding any fraction.
(3) Add the day of [...]