You could simply count the 30 days to answer your question.ver_mathstats said:Homework Statement
Number the days of the week from 0 - Sun to 6 - Sat. Today is Monday, use addition modulo 7 to find the day of the week 30 days from now.
Homework Equations
The Attempt at a Solution
0 - Sunday, 1 - Monday, 2 - Tuesday, 3 - Wednesday, 4 - Thursday, 5 - Friday, and 6 - Saturday. Do we just take 30 mod 7 which is equal to 2 and Tuesday would be our day? Or must I add 1 + 2 = 3 so that Wednesday is the day?
Thank you.
Yes that's why I'm confused, that's how the question was worded and I wasn't sure if I had to include the Monday or not, when I counted it I got Tuesday but I am still unsure if I must include the Monday. Thank you for the reply however.fresh_42 said:You could simply count the 30 days to answer your question.
If today is Monday, then we have day 1. In 30 days we have day 31, which is 3 modulo seven, i.e. Wednesday.
However, if "from now on" means to count today as well, then it's 1+29=30 = 2, Tuesday.
Thus it is more a matter of language than of mathematics. I hate those questions for their notorious ambiguity.
If today is Monday, what day is it one day from now? Did you count Monday? If you did, it would still be Monday one day from now.ver_mathstats said:Yes that's why I'm confused, that's how the question was worded and I wasn't sure if I had to include the Monday or not, when I counted it I got Tuesday but I am still unsure if I must include the Monday. Thank you for the reply however.