Nov 5, 2020 · The teacher's formula is incorrect. It should be floor rather than ceiling. I checked a couple different spans of multiple years day by day with a spreadsheet and an online calendar; the formula …

2 I'm more familiar with the saying as "a stopped clock is right twice a day", which is obviously correct for a standard 12 hour analog clock (with a possible exception involving leap-seconds).

Feb 23, 2016 · 80 hours per week i.e. 10 hours a day every day including sunday? That seems impossibly high, I would expect anyone who puts in this much work to be basically obsessed by math …

Apr 20, 2011 · Zeller's Congruence, modified for modern computing conventions, provides a simple algorithm for determining day of the week for any day of the Gregorian Calendar, which came into …

May 2, 2021 · With this method you can also find out the day of the week for a given date in a remote year. In that case, you need the fact that a normal year has 365 days while a leap year has 366 days.

Jan 6, 2016 · You might have seen the viral posts about " save a penny a day for a year and make $667.95! " The mathematicians here already get the concept while some others may be going, " what "?

Feb 11, 2020 · The repetition of the weekdays every $28$ years is based on the assumption that every fourth year is a leap year. This assumption is, however, broken for years such as $2100$ (which is …

Then this can be combined with modulo 7 arithmetic on an ordinal day to calculate the day of the week for a particular date. For example, Gauss's algorithm can tell us that, this year, the 1st of January fell …

Jul 23, 2020 · Here is a graph of annual temperature variation for a planet with an $8$ -day year and a maximum night-to-day ratio of $2$ to $1,$ obtained using Hermite interpolation:

Apr 3, 2023 · I am modeling a hydrogen refueling station with an average of 2.5 cars arriving per day. This can be modeled using a Poisson distribution. Each car has the following (discrete) probability …