Math CentralQuandaries & Queries


Question from Darek:

The question is the following:
Last Friday 4th of April of 2014 John was 40 years old. How old will John be the next time when his birthday fell on Friday?
Thanks for your help

Hi Darek,

I can get you started.

There are 365 days in a year and 365 divided by 7 is 52 with a remainder of 1. 365 days after Friday April 4th 2014 it will be April 4 2015. That's 52 weeks plus one day after Friday April 4th 2014 so it is Saturday April 4, 2015.

2016 is divisible by 4 so the next year, 2016 is a leap year and hence there are 366 days in that year. What day of the week is April 4, 2016?


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS