Posted by **Nick** on Monday, December 10, 2007 at 9:37pm.

What day of the week is 263 days from Monday? That is Monday 12-10-2007.

Is it Wednesday?

- Calculus -
**Count Iblis**, Monday, December 10, 2007 at 9:46pm
7 days later it is again the same day of the week, so it is convenient to define a new number system in which

7 = 0. It turns out that you can do arithmetic in this new number system in the same way as in the ordinary number system.

If 7 equals zero, you can subtract 7 and still have the same number. So:

10 = 3

If you square both sides:

100 = 9 = 2

multiply both sides by 2:

200 = 4

Now, if you remember your multiplication tables, 63 = 9*7 = 0. Therefore 263 = 200 = 4

This means that 263 later it will be 4 days later in the week, i.e. Friday.

## Answer this Question

## Related Questions

- Math - Invitations were sent one week before the big event. Replies started ...
- Linear Programming and Applications - The production-line employees at GE work ...
- programming - How do you write a program that prints out your course schedule ...
- Fund of programming 1 - Write a program that prints out your course schedule for...
- math - Monday=6 Wednesday=9, and Saturday = 8. Find the sum of the values of all...
- days of the week - i'm choosing classes for my college and i know M is monday T ...
- algebra - Hong goes running Monday, Wednesday, and Friday of each week. Each ...
- math - if 5 days before the day after tomorrow is a monday.What day of the week ...
- math - the track cpach records the number of laps the team runs each day fr a ...
- Math - I have another question-Mr. Burns ran 14 miles last week. He only ran on ...